@article{GDZPPN00235635X, title = {On the fundamental group of a space of sections.}, journal = {Mathematica Scandinavica}, volume = {47}, year = {1980}, pages = {232-246}, zbl = {0463.55010}, url = {http://dml.mathdoc.fr/item/GDZPPN00235635X} }
Thomas, E.; Larmore, L.L. On the fundamental group of a space of sections.. Mathematica Scandinavica, Tome 47 (1980) pp. 232-246. http://gdmltest.u-ga.fr/item/GDZPPN00235635X/