@article{ELA_2005__14__a1,
     author = {Johnson, Charles R. and da Gra\c{c}a Marques, Maria},
     title = {Patterns of commutativity: the commutant of the full pattern},
     journal = {The electronic journal of linear algebra},
     pages = {43--50},
     publisher = {mathdoc},
     volume = {14},
     year = {2005},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/ELA_2005__14__a1/}
}