TY - GEN AU - Sommerhäuser, Yorck, AU - Zhu, Yongchang, CN - QA613.8 ID - 1365817 KW - Hopf algebras. KW - Modular groups. LK - https://univsouthin.idm.oclc.org/login?url=https://ebookcentral.proquest.com/lib/usiricelib-ebooks/detail.action?docID=3114441 N1 - "September 2012 , Volume 219, Number 1028 (first of 5 numbers)." SN - 9780821891087 (e-book) T1 - Hopf algebras and congruence subgroups / TI - Hopf algebras and congruence subgroups / UR - https://univsouthin.idm.oclc.org/login?url=https://ebookcentral.proquest.com/lib/usiricelib-ebooks/detail.action?docID=3114441 VL - Volume 219, Number 1028 ER -