@article{BUMI_2007_8_10B_3_a32,
     author = {Yuan, Liping and Zamfirescu, Carol T.},
     title = {Acute {Triangulations} of {Doubly} {Covered} {Convex} {Quadrilaterals}},
     journal = {Bollettino della Unione matematica italiana},
     pages = {933--938},
     publisher = {mathdoc},
     volume = {Ser. 8, 10B},
     number = {3},
     year = {2007},
     zbl = {1185.52018},
     mrnumber = {2507906},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/BUMI_2007_8_10B_3_a32/}
}