@article{NUMA_1966__8_131687,
     author = {F.W. SCH\"AFKE and D. SCHMIDT},
     title = {Ein {Verfahren} zur {Berechnung} des charakteristischen {Exponenten} der {Mathieuschen} {Differentialgleichung.} {III.}},
     journal = {Numerische Mathematik},
     pages = {68--71},
     publisher = {mathdoc},
     volume = {8},
     year = {1966},
     zbl = {0173.17905},
     url = {http://geodesic.mathdoc.fr/item/NUMA_1966__8_131687/}
}