Gadella, Theo, Paul Maas, Per M. Jørgensen, Peter van Welzen, Flávio Obermüller, Douglas Daly, and Nina Rønsted. “IN MEMORIAM: CEES (‘KEES’) BERG, JULY 2nd 1934 – AUGUST 31st, 2012”. Thai Forest Bulletin (Botany), no. 40 (November 24, 2014): 4–8. Accessed April 27, 2024. https://li01.tci-thaijo.org/index.php/ThaiForestBulletin/article/view/24118.