http://www.electronics-tutorials.ws/waveforms/monostable.html

http://www.visionics.ee/curriculum/Experiments/Monostable/Monostable%20Multivibrator1.html

http://www.interfacebus.com/Transistor-Multivibrator-Definition.html

http://www.play-hookey.com/digital/experiments/rtl_monostable.html

http://www.nsa.gov/public_info/_files/tech_journals/Analysis_of_a_Transistor.pdf

http://www.daenotes.com/electronics/digital-electronics/mono-stable-multivibrators-working-construction-types?page=0%2C0#axzz23na9EAvg