Muñoz, Jesús. “Grimmia Arcuatifolia and G. Leibergii (Musci, Grimmiaceae), Two Neglected Species from Northwestern North America”. Anales del Jardín Botánico de Madrid 57, no. 1 (June 30, 1999): 7–13. Accessed April 19, 2024. https://rjb.revistas.csic.es/index.php/rjb/article/view/184.