Feigin G.A. (1961) Free amino acids in the cerebrospinal fluid in otogenic intracranial complications. Voprosy Meditsinskoi Khimii, 7(3), 291-296.

et al. Free amino acids in the cerebrospinal fluid in otogenic intracranial complications // Voprosy Meditsinskoi Khimii. - 1961. - V. 7. -N 3. - P. 291-296.

et al., "Free amino acids in the cerebrospinal fluid in otogenic intracranial complications." Voprosy Meditsinskoi Khimii 7.3 (1961): 291-296.

Feigin, G. A. (1961). Free amino acids in the cerebrospinal fluid in otogenic intracranial complications. Voprosy Meditsinskoi Khimii, 7(3), 291-296.