Samrat Singh, T.; Sumitra, C.; David Singh, T. Comparative 4f-4f Spectral Analysis of Simultaneous Complexation of Pr(III) With L-Tryptophan in Presence and Absence of Ca2+ and Zn2+ Ions in Aqueous Medium: Energy, Intensity and Kinetic Studies. ajc 2022, 34, 3183-3188.