Polish Entomological Society - Polskie Towarzystwo Entomologiczne

Sphingidae of the Western Palearctic by A.R. Pittaway

The butterflies of Europe by Paolo Mazzei

Sphingidae North America by W. Oehlke

Systematyka Sphingidae by Markku Savela

Insect of the former Soviet Union by Dmitriy Sobanin

Moths of USA - Sphingidae by USGS

Honk-Kong Sphingidae Photo Gallery by R.C. Kendrick

Colour Atlas of the Siberian Lepidoptera by Eduard Berlov