@article{1062621138, author = {Hulpke, Alexander}, title = {Block systems of a Galois group}, journal = {Experiment. Math.}, volume = {4}, number = {4}, year = {1995}, pages = { 1-9}, language = {en}, url = {http://dml.mathdoc.fr/item/1062621138} }
Hulpke, Alexander. Block systems of a Galois group. Experiment. Math., Tome 4 (1995) no. 4, pp. 1-9. http://gdmltest.u-ga.fr/item/1062621138/