@article{10_4064_ap89_2_3,
     author = {Szymon M. Walczak},
     title = {Collapse of warped submersions},
     journal = {Annales Polonici Mathematici},
     pages = {139--146},
     publisher = {mathdoc},
     volume = {89},
     number = {2},
     year = {2006},
     doi = {10.4064/ap89-2-3},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/ap89-2-3/}
}