Ruangsanka, Samaporn, Nonthawat Homprae, and Jirawat Ruangnet. 2019. “STAGES OF MICROSPORE DEVELOPMENT IN VARIOUS SIZES OF LILIUM LONGIFLORUM VAR. FORMOLONGO FLOWER BUDS”. PSRU Journal of Science and Technology 5 (1). Phitsanulok, Thailand:23-30. https://ph01.tci-thaijo.org/index.php/Scipsru/article/view/197759.