@inbook{Butts2011,
author = {Butts, C.T. and Acton, R.M.},
title= {Spatial modeling of social networks},
year = {2011},
doi = {10.4135/9781446201046.n12},
editor = {Nyerges, T.L.},
editor = {Couclelis, H.},
editor = {McMaster, R.},
booktitle = {The SAGE handbook of GIS and society},
address = {Thousand Oaks, CA},
publisher = {SAGE},
pages = {222--250},
}