4Kwan M P. GIS methods in time-geographic research: Geocomputation and geovisualization of human activity patterns. Geogr. Ann., 2004, 86 B (4): 267-280.
5Timmermans H, Arentze T, Joh C H. Analyzing spacetime behavior: New approaches to old problems. Progress in Human Geography, 2002, 26(2): 175-190.
6Raubal M, Miller H J, Bridwell S. User-centered time geography for location-based services. Geogr. Ann., 2004, 86 B(4): 245-265.
7Bishr Y. OGC's open location services initiative and location interoperability forum: Putting them together, http:// www.jlocationservices.com/educationalresources, 2002.
8Gibson J J. The theory of affordances//Robert E S, Bransford J. Perceiving, acting, and knowing. Hillsdale, NJ: Lawrence Erlbaum Associates, 1977.
9Warren W. Constructing an econiche//Flack J, Hancock P, Caird J, et al. Global perspectives on the ecology of human-machine systems. Hillsdale, N J: Lawrence Erlbaum Associates,1995.
10Rasmussen J, Pejtersen A. Virtual ecology of work//Flack J, Hancock P, Caird J, et al. Global perspectives on the ecology of human-machine systems. Hillsdale, N J:Lawrence Erlbaum Associates,1995.
