@article{IM_1989__97_2_143714,
     author = {W.A. Veech},
     title = {Teichm\"uller curves in moduli space, {Eisenstein} series and an application to triangular billiards.},
     journal = {Inventiones mathematicae},
     pages = {553--584},
     year = {1989},
     volume = {97},
     number = {2},
     zbl = {0676.32006},
     url = {http://geodesic.mathdoc.fr/item/IM_1989__97_2_143714/}
}