Gallo, Lorenzo. “Sempervivum Guillemotii Lamotte (Crassulaceae), a Rediscovered Houseleek of the French-Italian Alps”. Webbia 75, no. 1 (July 1, 2020): 69–76. Accessed April 19, 2024. https://oaj.fupress.net/index.php/webbia/article/view/7940.