@article{MZ_1987__196_173896,
     author = {Arunava Mukherjea and Steve Gibert},
     title = {Products of {Infinite-Dimensional} {Non-Negative} {Matrices;} {Extension} of {Hajnal's} {Results.}},
     journal = {Mathematische Zeitschrift},
     pages = {485--490},
     publisher = {mathdoc},
     volume = {196},
     year = {1987},
     zbl = {0613.15018},
     url = {http://geodesic.mathdoc.fr/item/MZ_1987__196_173896/}
}