“Effectiveness of Sources and Doses of Silicon for Growth, Photosynthetic Pigments and Cardenolide Content in Digitalis Mariana Boiss Subsp. Heywoodii in Vitro”. Research, Society and Development 12, no. 2 (January 20, 2023): e5412239719. Accessed June 29, 2025. https://ojs34.rsdjournal.org/index.php/rsd/article/view/39719.