Müller, Andreas. “Palaearctic Chelostoma Bees of the Subgenus Gyrodromella (Megachilidae,    Osmiini): Biology, Taxonomy and Key to Species”. Zootaxa 3936, no. 3 (March 20, 2015): 408–420. Accessed July 12, 2025. https://mapress.com/zt/article/view/zootaxa.3936.3.6.