Abdalla Elmokhtar Ahmed ElesawiKyeong Soo KimHierarchical Multi-Building And Multi-Floor Indoor Localization Based On Recurrent Neural Networks.193-1962021CANDAR (Workshops)https://doi.org/10.1109/CANDARW53999.2021.00038conf/ic-nc/2021wdb/conf/ic-nc/candar2021w.html#ElesawiK21