%0 Journal Article %A Yohji Akama %A Nico Van Cleemput %T Spherical tilings by congruent quadrangles: Forbidden cases and substructures %J Ars Mathematica Contemporanea %D 2015 %P 297-318 %V 8 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.26493/1855-3974.581.a6a/ %R 10.26493/1855-3974.581.a6a %G en %F 10_26493_1855_3974_581_a6a