@article{MM2_1990__68_2_155521,
     author = {Holger Heidrich-Riske},
     title = {Die {Fundamentalgruppen} {Siegelscher} {Modulvariet\"aten.}},
     journal = {Manuscripta mathematica},
     pages = {161--190},
     publisher = {mathdoc},
     volume = {68},
     number = {2},
     year = {1990},
     zbl = {0716.14009},
     url = {http://geodesic.mathdoc.fr/item/MM2_1990__68_2_155521/}
}