@article{MZ_1960__73_169854,
     author = {W.B. Jurkat},
     title = {On the analytic structure of semi-groups of positive matrices.},
     journal = {Mathematische Zeitschrift},
     pages = {346--365},
     publisher = {mathdoc},
     volume = {73},
     year = {1960},
     zbl = {0091.13101},
     url = {http://geodesic.mathdoc.fr/item/MZ_1960__73_169854/}
}