NAINGGOLAN, H. L.; ARITONANG, J.; SIHOMBING, M.; SUPRIANA, T.; TAFSIN, M. 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, v. 7, n. 2, p. Article Nr. 106, 18 Dec. 2019.