@article{van der VELDE Martin_1540, author = {van der VELDE Martin, van NAERSSEN Ton}, title = {Acting on Thresholds: Policies and geographical thresholds to mobility}, publisher = {PROGRESS IN GEOGRAPHY}, year = {2017}, journal = {PROGRESS IN GEOGRAPHY}, volume = {36}, number = {12}, eid = {1540}, pages = {1540-1551}, keywords = {borders;mobility, migration;thresholds;decision making}, doi = https://www.progressingeography.com/EN/10.18306/dlkxjz.2017.12.009 }