1.
Quick measurement of protein sulfhydryls with Ellman's reagent and with 4,4'-dithiodipyridine
by Riener, Christian K
Analytical and bioanalytical chemistry, 2002-07, Vol.373 (4-5), p.266-276

2.
Frequency modulation atomic force microscopy: a dynamic measurement technique for biological systems
by Higgins, Michael J
Nanotechnology, 2005-03-01, Vol.16 (3), p.S85-S89
