Spatial decision support system for home-delivered services. - Wilpen Gorr; Michael Johnson; Stephen Roehrig (J. Geogr. Syst., 2001)

Location of Service Facilities for the Elderly. - Michael P. Johnson; Wilpen Gorr; Stephen Roehrig (Ann. Oper. Res., 2005)

Planning for meals-on-wheels: algorithms and application. - Hakan Yildiz; Michael P. Johnson; Stephen Roehrig (J. Oper. Res. Soc., 2013)