A. Pandit, A. Ekka, A. P. Sharma, B. K. Bhattacharjya, P. K. Katiha, and D. K. Biswas, “Economic valuation of natural ecosystems – an empirical study in a stretch of Bramhaputra River in Assam, North-east India”, Indian J. Fish., vol. 62, no. 3, Sep. 2015, doi: 10.21077/.