@article{10_26493_1855_3974_581_a6a,
     author = {Yohji Akama and Nico Van Cleemput},
     title = {
		{Spherical} tilings by congruent quadrangles: {Forbidden} cases and substructures
	},
     journal = {Ars Mathematica Contemporanea},
     pages = {297--318},
     publisher = {mathdoc},
     volume = {8},
     number = {2},
     year = {2015},
     doi = {10.26493/1855-3974.581.a6a},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.26493/1855-3974.581.a6a/}
}