“?TRACE ELEMENT STUDIES IN UROLITHIASIS: PRELIMINARY INVESTIGATION ON CALCIUM OXALATE AND MIXED CALCIUM OXALATE-HYDROXYAPATITE URINARY CALCULI”. 1995. Biological Sciences - PJSIR 38 (1): 8-10. https://www.v2.pjsir.org/index.php/biological-sciences/article/view/2423.