Lee, W. C. (1998). A New Value System for Graduating Potential Life Lost. Journal of Medical Sciences, 18(4), 209-214. https://www.airitilibrary.com/Article/Detail?DocID=10114564-199802-201306040001-201306040001-209-214
ALZER, H. (1992). A NOTE ON A FUNCTIONAL INEQUALITY. International Journal of Mathematics and Mathematical Sciences, 1992(), 413-415. https://doi.org/10.1155/S0161171292000553