Martín Esteban, María Paz, and Mikael Jeppson. “An Interesting <i>Lycoperdon< i> Affin to <i>L. ericaeum< I>”;. Revista Catalana De Micologia, vol. 23, Mar. 2007, pp. 47-50, https://raco.cat/index.php/Micologia/article/view/272448.