| Divisio apostolorum |
The sequentia Celi enarrant gloriam dei (by Godeschalk of Limburg) is in a number of manuscripts, a.o. NL-Uu 417, NL-Hs 184 C 7, B-Br 3104.
 | M. McGrade: Gottschalk of Aachen, the investiture controversy, and music for the feast of the Divisio Apostolorum, in: JAMS 49 (Fall 1996), pp. 351-408 |