@article{SIGMA_2016_12_a7,
     author = {Erik Koelink and Pablo Rom\'an},
     title = {Orthogonal vs. {Non-Orthogonal} {Reducibility} of {Matrix-Valued} {Measures}},
     journal = {Symmetry, integrability and geometry: methods and applications},
     year = {2016},
     volume = {12},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SIGMA_2016_12_a7/}
}