“?SPECTROPHOTOMETRIC DETERMINATION OF PA-LLADIUM (II) WITH RUBEANIC ACID (RA) IN PRESENCE OF PYRIDINE, PIPERIDINE AND 3-PICOLINE”. Biological Sciences - PJSIR 42, no. 4 (August 23, 1999): 173–176. Accessed March 10, 2026. https://www.v2.pjsir.org/index.php/biological-sciences/article/view/2145.