@article{ZNSL_2019_485_a2,
     author = {N. Vavilov and Z. Zhang},
     title = {Commutators of relative and unrelative elementary groups, revisited},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {58--71},
     publisher = {mathdoc},
     volume = {485},
     year = {2019},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_2019_485_a2/}
}