Popovych О., Vashulenko О., & Kostrіtsia О. . . (2021). CHANGES IN THE AGE OF MAXIMUM HANGES IN THE AGE OF MAXIMUM PRODUCTIVITY OF RESEARCHERS RODUCTIVITY OF RESEARCHERS IN THE 21 N THE 21ST CENTURY. Science and Innovation, 17(6), 41–49. https://doi.org/10.15407/scine17.06.041