Verkhovtseva T.P., Surikova E.I. (1956) Quantitative chromatography of vitamin B12 produced by some microorganisms. Voprosy Meditsinskoi Khimii, 2(6), 438-442.

Verkhovtseva T.P. et al. Quantitative chromatography of vitamin B12 produced by some microorganisms // Voprosy Meditsinskoi Khimii. - 1956. - V. 2. -N 6. - P. 438-442.

Verkhovtseva T.P. et al., "Quantitative chromatography of vitamin B12 produced by some microorganisms." Voprosy Meditsinskoi Khimii 2.6 (1956): 438-442.

Verkhovtseva, T. P., Surikova, E. I. (1956). Quantitative chromatography of vitamin B12 produced by some microorganisms. Voprosy Meditsinskoi Khimii, 2(6), 438-442.