Pongthornpruek, Supaporn, Savent Pampasit, Kongsakdi Promtep, and Pensiri Nabheerong. 2017. “The diversity of pteridophytes along a natural trial at Phu Soi Dao national park, Phitsanulok province, Thailand”. Asia-Pacific Journal of Science and Technology 13 (8):895-905. https://so01.tci-thaijo.org/index.php/APST/article/view/83554.