@article{ASNSP_1970_3_24_1_79_0,
     author = {Haddad, Hadi M.},
     title = {Chain sequence preserving linear transformations},
     journal = {Annali della Scuola Normale Superiore di Pisa - Scienze Fisiche e Matematiche},
     pages = {79--84},
     publisher = {Scuola normale superiore},
     volume = {Ser. 3, 24},
     number = {1},
     year = {1970},
     mrnumber = {261206},
     zbl = {0191.35304},
     language = {en},
     url = {http://www.numdam.org/item/ASNSP_1970_3_24_1_79_0/}
}