@article{ASNSP_1950_3_4_3-4_231_0,
     author = {White, Paul A.},
     title = {On the union of two generalized manifolds},
     journal = {Annali della Scuola Normale Superiore di Pisa - Scienze Fisiche e Matematiche},
     pages = {231--243},
     publisher = {Scuola normale superiore},
     volume = {Ser. 3, 4},
     number = {3-4},
     year = {1950},
     mrnumber = {42113},
     zbl = {0039.39701},
     language = {en},
     url = {http://www.numdam.org/item/ASNSP_1950_3_4_3-4_231_0/}
}