@article{ELA_1996__1__a1,
     author = {Johnson, Charles R. and Kroschel, Brenda K.},
     title = {The combinatorially symmetric $P$-matrix completion problem},
     journal = {The electronic journal of linear algebra},
     pages = {59--63},
     publisher = {mathdoc},
     volume = {1},
     year = {1996},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/ELA_1996__1__a1/}
}