@article{10_4171_dm_509,
     author = {Wouter Castryck and Filip Cools},
     title = {A combinatorial interpretation for {Schreyer's} tetragonal invariants},
     journal = {Documenta mathematica},
     pages = {927--942},
     year = {2015},
     volume = {20},
     doi = {10.4171/dm/509},
     url = {http://geodesic.mathdoc.fr/articles/10.4171/dm/509/}
}