Baxodirovna, M. Z. “SYNTHESIS AND RESEARCH OF PHTHALOCYANINE PIGMENTS CONTAINING COBALT-CALCIUM PRESERVATION”. American Journal of Pediatric Medicine and Health Sciences (2993-2149), vol. 2, no. 3, Mar. 2024, pp. 209-12, http://grnjournal.us/index.php/AJPMHS/article/view/3825.