Edirin, FCA, J., M. Kelvin A., and E. Frank O. “DETERMINANTS OF RESEARCH AND DEVELOPMENT INVESTMENT: A MULTIVARIATE ANALYSIS OF WORKING CAPITAL, RETAINED EARNINGS, EBIT AND VALUE OF EQUITY”. GPH-International Journal of Business Management, Vol. 8, no. 05, June 2025, pp. 01-16, doi:10.5281/zenodo.15574963.