@article{ELMA_1985__40_141359,
     author = {R. Fritsch},
     title = {Zur {Kantenwinkelsumme} der regul\"aren {Pyramiden.}},
     journal = {Elemente der Mathematik},
     pages = {68--75},
     publisher = {mathdoc},
     volume = {40},
     year = {1985},
     zbl = {0569.52007},
     url = {http://geodesic.mathdoc.fr/item/ELMA_1985__40_141359/}
}