@article{10_4153_CJM_2015_055_7,
     author = {Klep, Igor and \v{S}penko, \v{S}pela},
     title = {Free {Function} {Theory} {Through} {MatrixInvariants}},
     journal = {Canadian journal of mathematics},
     pages = {408--433},
     year = {2017},
     volume = {69},
     number = {2},
     doi = {10.4153/CJM-2015-055-7},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-2015-055-7/}
}