Farber, Steven; Morang, Melinda Z.; Widener, Michael J. (1 September 2014). "Temporal variability in transit-based accessibility to supermarkets". Applied Geography. 53: 149–159. Bibcode:2014AppGe..53..149F. doi:10.1016/j.apgeog.2014.06.012.
Farber, Steven; Morang, Melinda Z.; Widener, Michael J. (1 September 2014). "Temporal variability in transit-based accessibility to supermarkets". Applied Geography. 53: 149–159. Bibcode:2014AppGe..53..149F. doi:10.1016/j.apgeog.2014.06.012.