Uzbekov G.A. (1958) Determination of amino nitrogen in proteins and amino acids by a colorimetric ninhydrin method. Voprosy Meditsinskoi Khimii, 4(1), 69-76.

et al. Determination of amino nitrogen in proteins and amino acids by a colorimetric ninhydrin method // Voprosy Meditsinskoi Khimii. - 1958. - V. 4. -N 1. - P. 69-76.

et al., "Determination of amino nitrogen in proteins and amino acids by a colorimetric ninhydrin method." Voprosy Meditsinskoi Khimii 4.1 (1958): 69-76.

Uzbekov, G. A. (1958). Determination of amino nitrogen in proteins and amino acids by a colorimetric ninhydrin method. Voprosy Meditsinskoi Khimii, 4(1), 69-76.