Discoides nutans

[Renier, S. A.]. ([1804]). Prospetto della Classe dei Vermi Nominati e Ordinati secondo il Sistema di Bosc [Work No. 25 on the Official Index of Rejected and Invalid Works in Zoological Nomenclature; see ICZN Opinion 316; Author and date cited in square brackets because not stated in the manuscript but inferred from external sources; Page proofs of introductory book text in folio sheets, never published]. xv-xxvi [Padua, Italy].