Petrova E.A. (1967) On the spectrophotometric dtermination of vitamin A in blood and liver. Voprosy Meditsinskoi Khimii, 13(6), 640-642.

et al. On the spectrophotometric dtermination of vitamin A in blood and liver // Voprosy Meditsinskoi Khimii. - 1967. - V. 13. -N 6. - P. 640-642.

et al., "On the spectrophotometric dtermination of vitamin A in blood and liver." Voprosy Meditsinskoi Khimii 13.6 (1967): 640-642.

Petrova, E. A. (1967). On the spectrophotometric dtermination of vitamin A in blood and liver. Voprosy Meditsinskoi Khimii, 13(6), 640-642.