Gessler N.N., Alekseeva N.V., Bykhovskiĭ V.Ya. (1994) Change in tryptamine metabolism in vitamin B12 deficiency. Voprosy Meditsinskoi Khimii, 40(1), 47-49.
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Gessler N.N. et al., "Change in tryptamine metabolism in vitamin B12 deficiency." Voprosy Meditsinskoi Khimii 40.1 (1994): 47-49.
Gessler, N. N., Alekseeva, N. V., Bykhovskiĭ, V. Ya. (1994). Change in tryptamine metabolism in vitamin B12 deficiency. Voprosy Meditsinskoi Khimii, 40(1), 47-49.