Stepanov R.V., Platonova L.V., Suslikov V.L., Paskhina T.S. (1991) Activity of elastase-like proteinases and their inhibitors in indigent nearly healthy residents in various biogeochemical conditions of the Chuvash ASSR. Voprosy Meditsinskoi Khimii, 37(4), 76-79.

Stepanov R.V. et al. Activity of elastase-like proteinases and their inhibitors in indigent nearly healthy residents in various biogeochemical conditions of the Chuvash ASSR // Voprosy Meditsinskoi Khimii. - 1991. - V. 37. -N 4. - P. 76-79.

Stepanov R.V. et al., "Activity of elastase-like proteinases and their inhibitors in indigent nearly healthy residents in various biogeochemical conditions of the Chuvash ASSR." Voprosy Meditsinskoi Khimii 37.4 (1991): 76-79.

Stepanov, R. V., Platonova, L. V., Suslikov, V. L., Paskhina, T. S. (1991). Activity of elastase-like proteinases and their inhibitors in indigent nearly healthy residents in various biogeochemical conditions of the Chuvash ASSR. Voprosy Meditsinskoi Khimii, 37(4), 76-79.