Castel, J. M., Madry, W., Gozdowski, D., Roszkowska-Madra, B., Dabrowski, M., Lupa, W. and Mena, Y. (1) “Family dairy farms in the Podlasie province, Poland: farm typology according to farming system”, Spanish Journal of Agricultural Research, 8(4), pp. 946-961. doi: 10.5424/sjar/2010084-1390.