“SYNTHESIS AND RESEARCH OF PHTHALOCYANINE PIGMENTS CONTAINING COBALT-CALCIUM PRESERVATION”. American Journal of Pediatric Medicine and Health Sciences (2993-2149) 2, no. 3 (March 21, 2024): 209–212. Accessed January 16, 2026. https://grnjournal.us/index.php/AJPMHS/article/view/3825.