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