1 literature reference for Julus belgicus gracilis Rothenb├╝hler:

Author: Pedroli-Christen, Ariane
Year: 1993
Title: Faunistique des mille-pattes de Suisse (Diplopoda) - Faunistik der Tausendf├╝ssler der Schweiz (Diplopoda)
Source: Documenta Faunistica Helvetiae, 14: 1-167, i-lxii: 1-167, i-lxii.