@article{GDZPPN002409151, title = {The Section Problem and the Lifting Problem.}, journal = {Mathematische Zeitschrift}, volume = {121}, year = {1971}, pages = {273-287}, zbl = {0207.22203}, url = {http://dml.mathdoc.fr/item/GDZPPN002409151} }
Booth, Peter I. The Section Problem and the Lifting Problem.. Mathematische Zeitschrift, Tome 121 (1971) pp. 273-287. http://gdmltest.u-ga.fr/item/GDZPPN002409151/