Mpeta, D., Kuzilwa, J. and Sebyiga, B. (2018) “ANALYSIS OF CONTRACT FARMING EFFECTS ON EFFICIENCY AND PRODUCTIVITY OF SMALL-SCALE SUNFLOWER FARMERS IN TANZANIA – A PROPENSITY SCORE METHOD APPROACH”, Acta Scientiarum Polonorum. Oeconomia, 17(1), pp. 75-84. doi: 10.22630/ASPE.2018.17.1.9.