“Increase Production Secondary Substances in Hedera Helix L. Callus by Abiotic Elicitor”. Journal of the College of Basic Education 32, no. 137 (August 20, 2026): 1144–1159. Accessed August 23, 2026. https://cbej.uomustansiriyah.edu.iq/index.php/cbej/article/view/15688.