Sign patterns that require a positive or nonnegative left inverse.
Kim, In-Jae ; Shader, Bryan L.
ELA. The Electronic Journal of Linear Algebra [electronic only], Tome 17 (2008), p. 209-218 / Harvested from The Electronic Library of Mathematics
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Publié le : 2008-01-01
EUDML-ID : urn:eudml:doc:129567 
@article{05280016,
     title = {Sign patterns that require a positive or nonnegative left inverse.},
     journal = {ELA. The Electronic Journal of Linear Algebra [electronic only]},
     volume = {17},
     year = {2008},
     pages = {209-218},
     zbl = {1154.15006},
     language = {en},
     url = {http://dml.mathdoc.fr/item/05280016}
}

Kim, In-Jae; Shader, Bryan L. Sign patterns that require a positive or nonnegative left inverse.. ELA. The Electronic Journal of Linear Algebra [electronic only], Tome 17 (2008) pp. 209-218. http://gdmltest.u-ga.fr/item/05280016/