@article{Brown1975,
author = {Brown, R.L. and Durbin, J. and Evans, J.M.},
title= {Techniques for testing the constancy of regression relationships over time},
year = {1975},
doi = {10.1111/j.2517-6161.1975.tb01532.x},
volume = {37},
number = {2},
pages = {149--163},
}