[1]
N. M. Oreskovic, J. Blossom, A. E. Field, S. R. Chiang, J. P. Winickoff, and R. E. Kleinman, “Combining global positioning system and accelerometer data to determine the locations of physical activity in children”, Geospat Health, vol. 6, no. 2, pp. 263–272, May 2012.