Oreskovic, N. M., Blossom, J., Field, A. E., Chiang, S. R., Winickoff, J. P. and Kleinman, R. E. (2012) “Combining global positioning system and accelerometer data to determine the locations of physical activity in children”, Geospatial Health, 6(2), pp. 263-272. doi: 10.4081/gh.2012.144.