In the latest issue (4/2018) of the journal E+M Economics and Management is published paper by Irena Szarowská "IMPORTANCE OF R&D EXPENDITURE FOR ECONOMIC GROWTH IN SELECTED CEE COUNTRIES". The full paper is available here:

http://www.ekonomie-management.cz/archiv/vyhledavani/detail/1627-importance-of-r-d-expenditure-for-economic-growth-in-selected-cee-countries/