Zamora, Prescillano, 		Chaimongkol, S., AND 		Marzan, M..
" Structure and Development of the Gametophytes of Philippine Cheilanthoid Ferns, III. <i>Cheilanthes concolor</i> (Langsdorff et Fischer) R. Tryon" <em>Science Diliman: A Journal of Pure and Applied Sciences</em> [Online], Volume 5 Number 2 (21 September 2007)