The excavation of Đa Kai : a neolithic circular settlement site in the upper reach of the Đồng Nai River, southern Vietnam - Nishimura, Masanari; Nguyễn, Duy Tỳ; Nguyễn, Xuân Lý (Foundation to Safeguard the Underground Cultural Heritage in Southeast Asia, 2009)
"This excavation research was funded by the Matsushita International Foundation, Japan"--t.p.