@article{10_4153_CJM_1968_119_6,
     author = {Barbeau, Edward J.},
     title = {Subordinate and {Pseudo-Subordinate} {Semi-Algebras.} {II}},
     journal = {Canadian journal of mathematics},
     pages = {1242--1245},
     year = {1968},
     volume = {20},
     number = {1},
     doi = {10.4153/CJM-1968-119-6},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-1968-119-6/}
}