@article{10_1017_S0017089514000391,
     author = {C\u{A}LUG\u{A}REANU, GRIGORE},
     title = {STRONGLY {INVARIANT} {SUBGROUPS}},
     journal = {Glasgow mathematical journal},
     pages = {431--443},
     year = {2015},
     volume = {57},
     number = {2},
     doi = {10.1017/S0017089514000391},
     url = {http://geodesic.mathdoc.fr/articles/10.1017/S0017089514000391/}
}