@article{MAN_1978__237_182788,
     author = {Serge Lang and Daniel S. Kubert},
     title = {The {Index} of {Stickelberger} {Ideals} of {Order2} and {Cuspidal} {Class} {Numbers} .},
     journal = {Mathematische Annalen},
     pages = {213--232},
     year = {1978},
     volume = {237},
     zbl = {0371.12023},
     url = {http://geodesic.mathdoc.fr/item/MAN_1978__237_182788/}
}