K. M. LUKING, D. F. GAWIN, and J. MENTIE, “Preliminary Study: Application of Spot-mapping Technique for Estimating the Size of Oriental Magpie Robin Cospychus saularis (Aves: Muscicapidae) Territories in Universiti Malaysia Sarawak (UNIMAS)”, TUR, vol. 2, no. 1, pp. a1-6, Jun. 2019.