2 literature references for Phyllium chlorophyllum (Stoll, 1813):

Author: Kirby
Year: 1904
Title:
Source: A synonymic catalogue of Orthoptera. 1. Orthoptera Euplexoptera, Cursoria et Gressoria. (Forficulidae, Hemimeridae, Blattidae, Mantidae, Phasmidae), The Trustees of the British Museum, London 1:1-501
Author: Westwood
Year: 1859
Title:
Source: Catalogue of the orthopterous insects in the collection of the British Museum. Part I. Phasmidae., British Museum, London 1-196