Evaluating Lost Person Behavior Models. - Elena Sava; Charles Twardy; Robert Koester; Mukul Sonwalkar (Trans. GIS, 2016)

Using GPS to Locate the Missing and Track Wandering in People with Alzheimer's Disease. - Janusz Wojtusiak; Reyhaneh Mogharab Nia; U. Nalla B. Durai; Beverly Middle; Robert Koester; Catherine Tompkins (AMIA, 2019)