@book{Howell2016,
author = {Howell, F.M. and Porter, J.R. and Matthews, S.A. },
title= {Recapturing space: New middle-range theory in spatial demography},
year = {2016},
doi = {10.1007/978-3-319-22810-5},
address = {Cham},
publisher = {Springer},
}