Roberts, D., E. Majewski, and P. Sulewski. “MEASURING THE LOCAL LINKAGES OF FARM HOUSEHOLDS (SPATIAL TRACKING APPROACH) IN NORTH EAST SCOTLAND (UK) AND PODLASKIE (POLAND)”. Acta Scientiarum Polonorum. Oeconomia, Vol. 10, no. 4, Dec. 2011, pp. 103-15, https://js.wne.sggw.pl/index.php/aspe/article/view/4037.