@article{BMMS_2010_33_2_a2,
     author = {Bing Bai and Zefang Wu and Xu Yang and Qinglin Yu},
     title = {Lexicographic {Product} of {Extendable} {Graphs}},
     journal = {Bulletin of the Malaysian Mathematical Society},
     year = {2010},
     volume = {33},
     number = {2},
     url = {http://geodesic.mathdoc.fr/item/BMMS_2010_33_2_a2/}
}