@article{1103899640, author = {Bosshard, B.}, title = {On the $b$-boundary of the closed Friedmann-model}, journal = {Comm. Math. Phys.}, volume = {46}, number = {1}, year = {1976}, pages = { 263-268}, language = {en}, url = {http://dml.mathdoc.fr/item/1103899640} }
Bosshard, B. On the $b$-boundary of the closed Friedmann-model. Comm. Math. Phys., Tome 46 (1976) no. 1, pp. 263-268. http://gdmltest.u-ga.fr/item/1103899640/