@article{Leeb:1979:ACM,
author = {Leeb, W. R.},
title = {Algorithm 537: Characteristic values of
{M}athieu's differential equation},
journal = {ACM Trans. Math. Software},
volume = {5},
year = {1979},
number = {1},
pages = {112–117},
issn = {0098-3500},
doi = {10.1145/355815.355824},
links = {\GAMSmodule{TOMS}{537}{8576}}}