@article{AUCMP_1989__30_2_a24,
     author = {Tuza, Zsolt},
     title = {$C_4$-saturated graphs of minimum size},
     journal = {Acta Universitatis Carolinae. Mathematica et Physica},
     pages = {161--167},
     publisher = {mathdoc},
     volume = {30},
     number = {2},
     year = {1989},
     mrnumber = {1046463},
     zbl = {0719.05040},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/AUCMP_1989__30_2_a24/}
}