Nikolaev, Rosen Nikolaev, Shabanova, M., Pavlova, M. The History of Composing the one Mathematical Olympiad Problem,
STEF92 Technology Ltd., 2017, p. 561 - 566, ISBN 978-619-7408-22-5 ; ISSN 2367-5659.
Nikolaev, Rosen Nikolaev, Shabanova, M., Pavlova, M. .
The History of Composing the one Mathematical Olympiad Problem.
Sofia: STEF92 Technology Ltd., 2017, p. 561 - 566, ISBN 978-619-7408-22-5 ; ISSN 2367-5659.
Nikolaev, Rosen Nikolaev, Shabanova, M., Pavlova, M. (2017)
The History of Composing the one Mathematical Olympiad Problem,
Sofia: STEF92 Technology Ltd., p. 561 - 566, ISBN 978-619-7408-22-5 ; ISSN 2367-5659
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