@article{10_4064_ap_13_2_163_171,
     author = {J. Acz\'el and M. Hosszu},
     title = {On concomitants of mixed tensors},
     journal = {Annales Polonici Mathematici},
     pages = {163--171},
     publisher = {mathdoc},
     volume = {13},
     number = {2},
     year = {1963},
     doi = {10.4064/ap-13-2-163-171},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/ap-13-2-163-171/}
}