3 literature references for Hylaeus annulatus (Linnaeus, 1758):

Author:
Year: 2008
Title:
Source: manuscript, World Bee Checklist Project - update 2008-09
Author:
Year: 2006
Title:
Source: database, Apoidea Database, Fauna Europaea
Author:
Year: 2004
Title:
Source: manuscript, Checklist of Apoidea of North America...