@article{LeSage2007,
author = {LeSage, J.P. and Pace, R.K. },
title= {A matrix exponential spatial specification},
year = {2007},
doi = {10.1016/j.jeconom.2006.09.007},
journal = {Journal of Econometrics},
volume = {140},
number = {1},
pages = {190--214},
}