WASET
    Yi-Ping Fang and  Hsien-Ting Cheng,  5-Aminolevulinic Acid-Loaded Gel, Sponge Collagen to Enhance the Delivery Ability to Skin.   journal   = {International Journal of Biotechnology and Bioengineering}, [online]. World Academy of Science, Engineering and Technology.
    June 2012, vol. 66(6). 377 - 380
    [viewed 25 April 2024]. Available from: https://publications.waset.org/pdf/7513.