This is what it looks like after adding a citation
Here is a cluster of citations[@Vrillon2020[@Robson2020; @Zhuang2020; @Farfour2020]]
see the double square bracket
and the output in word you see the three new citations are not picked up in the text although they appear in the references
Here is a cluster of citations^1
Vrillon, A. et al. COVID -19 in older adults: A series of 76 patients aged 850.167emYears and older with covid -19. Journal of the American Geriatrics Society (2020). doi:10.1111/jgs.16894
Robson, B. Computers and viral diseases. Preliminary bioinformatics studies on the design of a synthetic vaccine and a preventative peptidomimetic antagonist against the sars-cov-2 (2019-nCoV, covid-19) coronavirus. Computers in Biology and Medicine 119, 103670 (2020).
Zhuang, M. et al. Increasing host cellular receptorangiotensin-converting enzyme 2 expression by coronavirus may facilitate 2019-nCoV (or sars-CoV-2) infection. Journal of Medical Virology 92, 2693–2701 (2020).
Farfour, E. et al. The allplex 2019-nCoV (seegene) assay: Which performances are for sars-cov-2 infection diagnosis? European Journal of Clinical Microbiology & Infectious Diseases 39, 1997–2000 (2020).