B. A. LAGHARI, I. A. HALEPOTO, I. AHMED, A. K. RAJPAR, and R. H. MARI, “Photoelectron Extraction Efficiency of N,N′-Bis(3-methylphenyl)-N,N′-diphenylbenzidine (TPD) in CH4 and Ar+ CH4 Mixtures”, Sindh. Uni. Res. J. SS, vol. 53, no. 1, Apr. 2021.