Senowbari-Daryan B, Ingavat-Helmcke R. Sponge assemblage of some Upper Permian reef limestones from Phrae province (Northern Thailand). geologija [Internet]. 31. december 1993 [citirano 27. oktober 2026];36(1):5-59. Dostopno na: https://www.geologija-revija.si/index.php/geologija/article/view/816