@article{AUCMP_1978_19_1_a1,
     author = {Marek, I.},
     title = {Perron root of a convex combination of a positive kernel and its adjoint},
     journal = {Acta Universitatis Carolinae. Mathematica et Physica},
     pages = {3--14},
     year = {1978},
     volume = {19},
     number = {1},
     mrnumber = {0509637},
     zbl = {0401.47013},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/AUCMP_1978_19_1_a1/}
}