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*Ukrainian Soviet Encyclopedic Dictionary***3**(1968), 81.

- Georgii Vasilovich Pfeiffer,
*Ukrainian Soviet Encyclopedia***9**(Kiev, 1983), 205.

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*Trudi Inst. Mat. Nats. Akad. Nauk Ukraini***17**(1997), 75-88.

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*Visnik Kiev. Univ.***12**(1970), 114-120.

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*Visnik Kiiv. Univ. Ser. Mat. Meh.***15**(1973), 137-141; 147.