Sculptors’ Moulders and Art Cast Publishers. Casts taken from the Living and Deceased

http://www.npg.org.uk/research/programmes/british-bronze-founders-and-plaster-figure-makers-1800-1980-1/british-bronze-founders-and-plaster-figure-makers-1800-1980-s.php

http://felicecalchi.blogspot.co.uk/

https://curatorialpracticum.wordpress.com/2014/05/04/copies-in-plaster-the-bust-of-trajan-and-other-works-from-the-johnson-museum/

http://www.marciapointon.org/pdfs/DeathMasks.pdf 

http://www.degruyter.com/view/books/9783110216875/9783110216875.fm/9783110216875.fm.xml?format=EBOK