Buddhist Dictionary of Pali Proper Names by G P Malalasekera
Gūlhummagga
Gūlhummagga,Gūlhavessantara,Gūlhavinaya:Mentioned in the Commentaries (E.g.,Sp.iv.742) as abuddhavacanāni; they were probably books belonging to sects other than the orthodox Theravādins.