Goswami, Rupak and Basu, Debabrata (2006): Does information network affect spread of new crops? A study on the spread of bitter gourd and sunflower cultivation among the farmers of a Sunderbans island in West Bengal, India. Unpublished.
Marjit, Sugata and Mandal, Biswajit (2009): General Trading Costs in Pure Theory of International Trade. Unpublished.
