Mpeta, D., J. Kuzilwa, and B. Sebyiga. “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, Vol. 17, no. 1, Mar. 2018, pp. 75-84, doi:10.22630/ASPE.2018.17.1.9.