Deprecated: Using ${var} in strings is deprecated, use {$var} instead in /home/conscientiabeam/archive.conscientiabeam.com/plugins/generic/citationStyleLanguage/lib/vendor/seboettg/citeproc-php/src/StyleSheet.php on line 52
“R&D Investment: A Dynamic Efficiency Approach in the EU Countries ”. The Economics and Finance Letters, vol. 11, no. 3, Aug. 2024, pp. 221-3, https://doi.org/10.18488/29.v11i3.3865.