@article{JRAM_1989__402_153180,
     author = {Paul S. Muhly and Baruch Solel},
     title = {Subalgebras of groupoid {C*-algebras.}},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {41--75},
     publisher = {mathdoc},
     volume = {402},
     year = {1989},
     zbl = {0673.46037},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1989__402_153180/}
}