@article{Shirts:1993:AM,
author = {Shirts, R. B.},
title = {\NOOP{B}Algorithm 721: {MTIEU1} and {MTIEU2}: Two subroutines to compute
eigenvalues and solutions to {M}athieu's differential equation for
noninteger and integer order},
journal = {ACM Trans. Math. Software},
volume = {19},
year = {1993},
number = {3},
pages = {391–406},
note = {Double-precision Fortran, maximum accuracy 18D},
issn = {0098-3500},
doi = {10.1145/155743.155847},
links = {\GAMSmodule{TOMS}{721}{11787}},
zblno = {0892.65058}}