@article{AM2_1977__16_136695,
     author = {Osvaldo Marrero},
     title = {A survey of pseudo (v, k, ...)-designs.},
     journal = {Aequationes mathematicae},
     pages = {195--220},
     publisher = {mathdoc},
     volume = {16},
     year = {1977},
     zbl = {0373.05014},
     url = {http://geodesic.mathdoc.fr/item/AM2_1977__16_136695/}
}