@article{DMGT_2003_23_1_a1,
     author = {Orchel, Beata},
     title = {2-placement of (p,q)-trees},
     journal = {Discussiones Mathematicae. Graph Theory},
     pages = {23--36},
     publisher = {mathdoc},
     volume = {23},
     number = {1},
     year = {2003},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/DMGT_2003_23_1_a1/}
}