Tsvetkova I.V., Bakharev V.A., Kazi Z., Osipova G.N., Rozenfel'd E.L. (1980) Demonstration of arylsulfatase A deficiency in metachromatic leukodystrophy and prenatal diagnosis of the disease. Voprosy Meditsinskoi Khimii, 26(4), 461-464.

Tsvetkova I.V. et al. Demonstration of arylsulfatase A deficiency in metachromatic leukodystrophy and prenatal diagnosis of the disease // Voprosy Meditsinskoi Khimii. - 1980. - V. 26. -N 4. - P. 461-464.

Tsvetkova I.V. et al., "Demonstration of arylsulfatase A deficiency in metachromatic leukodystrophy and prenatal diagnosis of the disease." Voprosy Meditsinskoi Khimii 26.4 (1980): 461-464.

Tsvetkova, I. V., Bakharev, V. A., Kazi, Z., Osipova, G. N., Rozenfel'd, E. L. (1980). Demonstration of arylsulfatase A deficiency in metachromatic leukodystrophy and prenatal diagnosis of the disease. Voprosy Meditsinskoi Khimii, 26(4), 461-464.