http://plato.stanford.edu/entries/russell-paradox/

http://www.utm.edu/research/iep/p/par-russ.htm

http://www.cut-the-knot.com/selfreference/russell.html

Johnson Noise

http://www.its.bldrdoc.gov/projects/t1glossary2000/_thermal_noise.html

http://web.mit.edu/afs/athena/course/8/8.13/JLExperiments/JLExp_43.html

http://www.haverford.edu/physics-astro/course_materials/phys326/JohnsonNoiseNotes.htm