@article{ZHANG Yan_1056, author = {ZHANG Yan, CHAI Yan-Wei}, title = {The Spatio-temporal Activity Pattern of the Middle and the Low-income Residents in Beijing, China}, publisher = {SCIENTIA GEOGRAPHICA SINICA}, year = {2011}, journal = {SCIENTIA GEOGRAPHICA SINICA}, volume = {31}, number = {9}, eid = {1056}, pages = {1056-1064}, keywords = {urban middle and low-incomes;daily activity;spatio-temporal activity pattern;Beijing}, doi = http://geoscien.neigae.ac.cn/EN/10.13249/j.cnki.sgs.2011.09.1056 }