Shahjahan, R. M., Razzak, M. A., Islam, A. F., Saifullah, A., Yamanaka, A., Inoue, M., & Endo, K. (2009). Field Studies of Butterflies: A Trial for the Establishment of Indices to Evaluate the Seasonal Fluctuations and the Ecological States of Forests in Bangladesh. University Journal of Zoology, Rajshahi University, 27, 67–71. https://doi.org/10.3329/ujzru.v27i0.1958