@article{10_4064_am_21_4_537_544,
     author = {P K. Jha and G Slutzki},
     title = {A note on outerplanarity of product graphs},
     journal = {Applicationes Mathematicae},
     pages = {537--544},
     publisher = {mathdoc},
     volume = {21},
     number = {4},
     year = {1991},
     doi = {10.4064/am-21-4-537-544},
     zbl = {0770.05042},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/am-21-4-537-544/}
}