Torii, S. Effect of Filling Ratio on Heat Trasfer Performance in Multi-Heat Pipe With Graphene Oxide Nanofluid. Tạp Chí Khoa Học Công Nghệ Xây Dựng (TCKHCNXD) - ĐHXDHN, Vol 11, số p.h 4, July 2017, tr 15-21, https://stce.huce.edu.vn/index.php/vn/article/view/612.