Khuong, D. D., and N. T. Thu Huong. “Study Results on Species Compsition of Bugs (Heteroptera) in Phong Nha - Ke Bang National Park, Quang Binh Province”. Academia Journal of Biology, vol. 31, no. 3, Sept. 2014, pp. 41-45, doi:10.15625/0866-7160/v31n3.4944.