EVALUATION OF REPRODUCIBILITY METHODS FOR TOTAL PHENOLIC AND FLAVONOID CONTENT IN SKIN AND FLESH OF POTATO (SOLANUM TUBEROSUM) СтатьяPolivanova O.B., Gins E.M., Moskalev E.A., Simakov E.A., Goryunova S.V., Zhevora S.V.Research on Crops. Том 21. 2020. С. 520-528