@article{MM2_1979__29_154649,
     author = {Ulrich Hirsch},
     title = {Bordismus verzweigter {\"Uberlagerungen} von niedrigdimensionalen {Sph\"aren.}},
     journal = {Manuscripta mathematica},
     pages = {1--10},
     publisher = {mathdoc},
     volume = {29},
     year = {1979},
     zbl = {0413.57002},
     url = {http://geodesic.mathdoc.fr/item/MM2_1979__29_154649/}
}