@article{JRAM_1964__216_150651,
     author = {R.B. Dingle and H.J.W. M\"uller},
     title = {The {Form} of the {Coefficients} of the {Late} {Terms} in {Asymptotic} {Expansions} of the {Characteristic} {Numbers} of {Mathieu} and {Spheroidal-Wave} {Functions.}},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {123--133},
     publisher = {mathdoc},
     volume = {216},
     year = {1964},
     zbl = {0138.05401},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1964__216_150651/}
}