Vichev E.P., Karakashov A.V. (1960) Micromethod of direct complexometric titration of calcium in the blood serum. Voprosy Meditsinskoi Khimii, 6(4), 435-438.

Vichev E.P. et al. Micromethod of direct complexometric titration of calcium in the blood serum // Voprosy Meditsinskoi Khimii. - 1960. - V. 6. -N 4. - P. 435-438.

Vichev E.P. et al., "Micromethod of direct complexometric titration of calcium in the blood serum." Voprosy Meditsinskoi Khimii 6.4 (1960): 435-438.

Vichev, E. P., Karakashov, A. V. (1960). Micromethod of direct complexometric titration of calcium in the blood serum. Voprosy Meditsinskoi Khimii, 6(4), 435-438.