Selkov S.A., Khokhlov P.P. (1998) A new method for isolation and purification of pregnancy associated protein PAPP-a from retroplacental serum. Voprosy Meditsinskoi Khimii, 44(4), 399-404.

Selkov S.A. et al. A new method for isolation and purification of pregnancy associated protein PAPP-a from retroplacental serum // Voprosy Meditsinskoi Khimii. - 1998. - V. 44. -N 4. - P. 399-404.

Selkov S.A. et al., "A new method for isolation and purification of pregnancy associated protein PAPP-a from retroplacental serum." Voprosy Meditsinskoi Khimii 44.4 (1998): 399-404.

Selkov, S. A., Khokhlov, P. P. (1998). A new method for isolation and purification of pregnancy associated protein PAPP-a from retroplacental serum. Voprosy Meditsinskoi Khimii, 44(4), 399-404.