Lee, Young-Whan. “APPROXIMATE PEXIDERIZED EXPONENTIAL TYPE FUNCTIONS”. The Pure and Applied Mathematics, vol. 19, no. 2, 2012, pp. 193-8, https://doi.org/10.7468/jksmeb.2012.19.2.193.
Lee, Y.-W. (2012). APPROXIMATE PEXIDERIZED EXPONENTIAL TYPE FUNCTIONS. The Pure and Applied Mathematics, 19(2), 193-198. https://doi.org/10.7468/jksmeb.2012.19.2.193
Lee YW. APPROXIMATE PEXIDERIZED EXPONENTIAL TYPE FUNCTIONS. The Pure and Applied Mathematics. 2012;19(2):193-8.