Griban G. P., Prontenko Kostiantyn, Zhamardiy Valery, Tkachenko Pavlo, Kruk Mykola, Kostyuk Yuliya, Zhukovskyi Yevgenii (2018) Professional stages of a physical education teacher as determined using fitness technologies. Journal of Physical Education and Sport (18(2)). С. 565–569. ISSN 2247 - 806X