found: Binchois and his contemporaries, p1995:container (Bittering)
found: New Grove(Byttering (Bytteryng, Biteryng, Bytering), fl. c1410)
found: Grove music online, February 11, 2015(Byttering (Bytteryng, Biteryng, Bytering); flourished approximately 1410-1420; English composer; no certain identification has been made, though a possible candidate is Thomas Byteryng, a canon at Hastings Castle (1405-1408) and a rector in the London area from 1414)
notfound: Fétis;Encyclopédie de la musique, 1958.