@article{DMGAA_2019_39_1_a4,
     author = {Barati, Zahra and Afkhami, Mojgan},
     title = {The {Planar} {Index} and {Outerplanar} {Index} of {Some} {Graphs} {Associated} to {Commutative} {Rings}},
     journal = {Discussiones Mathematicae. General Algebra and Applications},
     pages = {55--68},
     publisher = {mathdoc},
     volume = {39},
     number = {1},
     year = {2019},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/DMGAA_2019_39_1_a4/}
}