Popens Ia., Silin'sh E., Vitols I. (1962) Fluorometric determination of 11-hydroxycorticosteroids in human blood plasma. Voprosy Meditsinskoi Khimii, 8(6), 628-634.

Popens Ia. et al. Fluorometric determination of 11-hydroxycorticosteroids in human blood plasma // Voprosy Meditsinskoi Khimii. - 1962. - V. 8. -N 6. - P. 628-634.

Popens Ia. et al., "Fluorometric determination of 11-hydroxycorticosteroids in human blood plasma." Voprosy Meditsinskoi Khimii 8.6 (1962): 628-634.

Popens, Ia., Silin'sh, E., Vitols, I. (1962). Fluorometric determination of 11-hydroxycorticosteroids in human blood plasma. Voprosy Meditsinskoi Khimii, 8(6), 628-634.