Nainggolan, H., Aritonang, J., Sihombing, M., Supriana, T. and Tafsin, M. (2019) “Structural modelling of rice fields-buffalo livestock based integrated agricultural systems in the context of regional development in Humbang Hasundutan, Indonesia”, Future of Food: Journal on Food, Agriculture and Society, 7(2/3), p. 106. Available at: http://futureoffoodjournal.org/index.php/FOFJ/article/view/251 (Accessed: 8December2019).