@article{IJAMCS_2002_12_2_a5,
     author = {Kaczorek, T.},
     title = {Externally and internally positive singular discrete-time linear systems},
     journal = {International Journal of Applied Mathematics and Computer Science},
     pages = {197--202},
     publisher = {mathdoc},
     volume = {12},
     number = {2},
     year = {2002},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IJAMCS_2002_12_2_a5/}
}