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et al., "Modification of the micromethod of estimation of citric acid in the bone tissue." Voprosy Meditsinskoi Khimii 22.3 (1976): 410-413.
Frenkel, L. A. (1976). Modification of the micromethod of estimation of citric acid in the bone tissue. Voprosy Meditsinskoi Khimii, 22(3), 410-413.