@article{10_4153_CJM_1972_095_4,
     author = {Wilson, Edward N.},
     title = {Extensions of {Homomorphisms} of {Parabolic} {Subgroups}},
     journal = {Canadian journal of mathematics},
     pages = {947--956},
     year = {1972},
     volume = {24},
     number = {5},
     doi = {10.4153/CJM-1972-095-4},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-1972-095-4/}
}