Kin Sum Liu Sirajum Munir Jonathan Francis Charles Shelton Shan Lin 0001 Long term occupancy estimation in a commercial space: an empirical study: poster abstract. 307-308 2017 IPSN https://doi.org/10.1145/3055031.3055062 https://ieeexplore.ieee.org/document/7944821 conf/ipsn/2017 db/conf/ipsn/ipsn2017.html#LiuMFSL17