Shlygin G.K., Poriadkov L.F. (1973) Method of determining enterokinase. Voprosy Meditsinskoi Khimii, 19(6), 662-665.

Shlygin G.K. et al. Method of determining enterokinase // Voprosy Meditsinskoi Khimii. - 1973. - V. 19. -N 6. - P. 662-665.

Shlygin G.K. et al., "Method of determining enterokinase." Voprosy Meditsinskoi Khimii 19.6 (1973): 662-665.

Shlygin, G. K., Poriadkov, L. F. (1973). Method of determining enterokinase. Voprosy Meditsinskoi Khimii, 19(6), 662-665.