Shapiro G.A., Chernov G.A., Ivanova V.D. (1966) Chromatographic study of tryptophan metabolites in urine in Izenko-Cushing disease. Voprosy Meditsinskoi Khimii, 12(2), 189-192.

Shapiro G.A. et al. Chromatographic study of tryptophan metabolites in urine in Izenko-Cushing disease // Voprosy Meditsinskoi Khimii. - 1966. - V. 12. -N 2. - P. 189-192.

Shapiro G.A. et al., "Chromatographic study of tryptophan metabolites in urine in Izenko-Cushing disease." Voprosy Meditsinskoi Khimii 12.2 (1966): 189-192.

Shapiro, G. A., Chernov, G. A., Ivanova, V. D. (1966). Chromatographic study of tryptophan metabolites in urine in Izenko-Cushing disease. Voprosy Meditsinskoi Khimii, 12(2), 189-192.