Here is a link to the "instruction for authors" page and description of style under 2.3.3.9 References (text copied below)
https://evcna.com/pages/view/author_instructions

and a link to a recent publication (using this style)
https://evcna.com/article/view/4702




2.3.3.9 References

References should be restricted to those of importance within the realm of your work and should be kept to a maximum of 30 (excluding reviews and meta-analyses). They should be numbered in order of appearance at the end of manuscripts. In the text, reference numbers should be placed in square brackets and the corresponding references are cited thereafter. If the number of authors is less than or equal to six, we require to list all authors’ names. If the number of authors is more than six, only the first three authors' names are required to be listed in the references, other authors’ names should be omitted and replaced with "et al.". Abbreviations of the journals should be provided on the basis of Index Medicus. Information from manuscripts accepted but not published should be cited in the text as "Unpublished material" with written permission from the source.
References should be described as follows, depending on the types of works:
Types Examples
Journal articles by individual authors Weaver DL, Ashikaga T, Krag DN, et al. Effect of occult metastases on survival in node-negative breast cancer. N Engl J Med 2011;364:412-21. [PMID: 21247310 DOI: 10.1056/NEJMoa1008108]
Organization as author Diabetes Prevention Program Research Group. Hypertension, insulin, and proinsulin in participants with impaired glucose tolerance. Hypertension 2002;40:679-86. [PMID: 12411462]
Both personal authors and organization as author Vallancien G, Emberton M, Harving N, van Moorselaar RJ; Alf-One Study Group. Sexual dysfunction in 1,274 European men suffering from lower urinary tract symptoms. J Urol 2003;169:2257-61. [PMID: 12771764 DOI: 10.1097/01.ju.0000067940.76090.73]
Journal articles not in English Zhang X, Xiong H, Ji TY, Zhang YH, Wang Y. Case report of anti-N-methyl-D-aspartate receptor encephalitis in child. J Appl Clin Pediatr 2012;27:1903-7. (in Chinese)
Journal articles ahead of print Odibo AO. Falling stillbirth and neonatal mortality rates in twin gestation: not a reason for complacency. BJOG 2018; Epub ahead of print [PMID: 30461178 DOI: 10.1111/1471-0528.15541]
Books Sherlock S, Dooley J. Diseases of the liver and billiary system. 9th ed. Oxford: Blackwell Sci Pub; 1993. pp. 258-96.
Book chapters Meltzer PS, Kallioniemi A, Trent JM. Chromosome alterations in human solid tumors. In: Vogelstein B, Kinzler KW, editors. The genetic basis of human cancer. New York: McGraw-Hill; 2002. pp. 93-113.
Online resource FDA News Release. FDA approval brings first gene therapy to the United States. Available from: https://www.fda.gov/NewsEvents/Newsroom/PressAnnouncements/ucm574058.htm. [Last accessed on 30 Oct 2017]
Conference proceedings Harnden P, Joffe JK, Jones WG, editors. Germ cell tumours V. Proceedings of the 5th Germ Cell Tumour Conference; 2001 Sep 13-15; Leeds, UK. New York: Springer; 2002.
Conference paper Christensen S, Oppacher F. An analysis of Koza's computational effort statistic for genetic programming. In: Foster JA, Lutton E, Miller J, Ryan C, Tettamanzi AG, editors. Genetic programming. EuroGP 2002: Proceedings of the 5th European Conference on Genetic Programming; 2002 Apr 3-5; Kinsdale, Ireland. Berlin: Springer; 2002. pp. 182-91.
Unpublished material Tian D, Araki H, Stahl E, Bergelson J, Kreitman M. Signature of balancing selection in Arabidopsis. Proc Natl Acad Sci U S A. Forthcoming 2002.

For other types of references, please refer to U.S. National Library of Medicine.

The journal also recommends that authors prepare references with a bibliography software package, such as EndNote to avoid typing mistakes and duplicated references.

thanks for your help and patience.

1) Within text (pls note: the number in the brackets should be smaller and higher - as in the text link; copying it to here didn't safe this:
Small EVs, especially exosomes, were discovered almost 40 years ago, and the first report on their functional impacts was reported in 1996[28-30].


2) 30. Raposo G, Nijman HW, Stoorvogel W, et al. B lymphocytes secrete antigen-presenting vesicles. J Exp Med 1996;183:1161-72.
DOIPubMed PMC

sorry, I don't understand. I just leave and write the paper with the other style and leave it to the editors to change it the way they want it. If I get the chance I will try to get EndNote. Thanks for your time.

thanks, sorry. I am not a bliblitecarian. I can't do this.

sorry, but you are totally wrong: for someone who is not familiar with this, it is basically impossible to do this. It was not understandable to me (I read and understand Nature, Science, Cell papers), I write papers, but I spent hours to write back and forth, i just didn't understand this. You ma not be able to design genetic PCR primer within seconds - even without any software just by looking at a genetic sequence, although it can be simple. These are just different worlds.
I understand there are volounteers, but you should understand, for me - and perhaps a number of others who don't want to go through this trouble, just don't even try to get a new style.
If it is just two or three minutes you needed to invest for something which is almost impossible for others (likehonestly me), it is not really understandable. I currently finish my paper and leave it with the style I had chosen, it was invited by famous professors, so it is up to the final editors to have that changed on their expenses, if they don't like the manuscript (although invited) I easily can send it anywhere.
Thanks for your time.

thank you so much, damnation !!! and sorry - I was so stupid, didn't even see your former link to the 'american journal of sonography', which was already closer than my alternative since it included 'superscript' (didn't recall that word superscript). After some mountain biking in the sunny forest, it seems to work now! Great.