@article{JRAM_1975__272_151529,
     author = {Ekkehard Wagenf\"uhrer},
     title = {\"Uber regul\"ar-singul\"are {L\"osungen} von {Systemen} linearer {Differentialgleichungen.} {II.}},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {150--172},
     publisher = {mathdoc},
     volume = {272},
     year = {1975},
     zbl = {0309.34006},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1975__272_151529/}
}