Ponichtera, Piotr. “The Sowing Value of Tansy Phacelia (<em>Phacelia Tanacetifolia Benth.</Em&gt;) Seeds in the Long-Term Storage”. Agricultural Engineering 20, no. 3 (October 17, 2016): 153–159. Accessed March 29, 2024. https://agriceng.ptir.org/index.php/AgricEng/article/view/153.