1) Methacanon P. ; Weerawatsophon, U.; Thainthongdee, M.; and Lekpittaya, P. “Optimum Conditions for Selective Separation of Kraft Lignin” KASETSART JOURNAL: NATURAL SCIENCE, Volume 044, Issue 4, July 2010- August 2010, Pages 680-690.

2) Lekpittaya P.; Thainthongdee M.; Onouen, S.; Weerawatsophon U. and Methacanon P. “Preparation of Kraft Lignin and Their Application in Natural Rubber Composites” 1^st Polymer Conference of Thailand, Bangkok, Thailand, 7-8 October, 2010. Janetaisong P.;

3) Lekpittaya P.; Weerawatsophon U. and Methacanon P. “Synthesis of Oligomer from Extracted Lignin Together with Vegetable oil for Coating Applications: A Preliminary Study” 1^st Polymer Conference of Thailand, Bangkok, Thailand, 7-8 October, 2010.

4) Looyrach J.; Methacanon P.; Gamonpilas C.; Lekpittaya P.; Lertworasirikul A., “Pomelo (Citrus maxima) Peel-Inspired Property for Development of Eco-Friendly Loose-Fill Foam” (2015), Key Engineering Materials, Vol. 659, pp. 279-283.

5) Kaewruksa P.; Maithong M.; Udomrat O.; Atitwong M.; Pattanasupong A., Lekpittaya P.; Lertworasirikul A., “Effect of Alkaline Lignin on Thermal, Mechanical Properties and Biodegradability of Poly(lactic acid)”, The 21st International Union of Materials Research Societies- International Conference in Asia (IUMRS-ICA 2020), 23 – 26 February 2021, Chiangmai, Thailand