Altenkirch, Thorsten; Danielsson, Nils Anders; Löh, Andres; Oury, Nicolas (2010). "ΠΣ: Dependent Types without the Sugar"(PDF). In Blume, Matthias; Kobayashi, Naoki; Vidal, Germán (eds.). Functional and Logic Programming, 10th International Symposium, FLOPS 2010, Sendai, Japan, April 19-21, 2010. Proceedings. Lecture Notes in Computer Science. Vol. 6009. Springer. pp. 40–55. doi:10.1007/978-3-642-12251-4_5.
Altenkirch, Thorsten; Danielsson, Nils Anders; Löh, Andres; Oury, Nicolas (2010). "ΠΣ: Dependent Types without the Sugar"(PDF). In Blume, Matthias; Kobayashi, Naoki; Vidal, Germán (eds.). Functional and Logic Programming, 10th International Symposium, FLOPS 2010, Sendai, Japan, April 19-21, 2010. Proceedings. Lecture Notes in Computer Science. Vol. 6009. Springer. pp. 40–55. doi:10.1007/978-3-642-12251-4_5.