Loschiavo, "LABORANTE.", § 2. Häring, p. 311, puts his death "about 1191". Conradus Eubel, however, indicates that Laborans had a successor at S. Maria trans Tiberim in 1190: Conradus Eubel (1913). Hierarchia catholica (in Latin). Vol. Tomus 1 (second ed.). Münster: Libreria Regensbergiana. pp. 3, note 1, no. 9, 44.
J.P. Migne (ed.), Patrologiae Latinae Cursus Completus Tomus CCI (Paris 1855), pp. 1347-1348. The volume contains more than sixty other references to signatures by Laborans in 1184–1185.
Loschiavo, "LABORANTE.", § 2. Häring, p. 311, puts his death "about 1191". Conradus Eubel, however, indicates that Laborans had a successor at S. Maria trans Tiberim in 1190: Conradus Eubel (1913). Hierarchia catholica (in Latin). Vol. Tomus 1 (second ed.). Münster: Libreria Regensbergiana. pp. 3, note 1, no. 9, 44.