Faraday, M. (1857). “Experimental Relations of Gold (and Other Metals) to Light,”. Philos. Trans. R. Soc. London147: 145. doi:10.1098/rstl.1857.0011.
M. Brust; M. Walker; D. Bethell; D. J. Schiffrin; R. Whyman (1994). “Synthesis of Thiol-derivatised Gold Nanoparticles in a Two-phase Liquid-Liquid System”. Chem. Commun. (7): 801. doi:10.1039/C39940000801.
Paclitaxel-Functionalized Gold Nanoparticles Jacob D. Gibson, Bishnu P. Khanal, and Eugene R. Zubarev J. Am. Chem. Soc.2007, 129, 11653-11661 doi:10.1021/ja075181k
C. N. Ramachandra Rao, Giridhar U. Kulkarni, P. John Thomasa, Peter P. Edwards, Metal nanoparticles and their assemblies, Chem. Soc. Rev., 2000, 29, 27-35. (on-line here; mentions Cassius and Kunchel)