http://books.google.com/books?id=Vk56HO8jf_AC&pg=PA358&lpg=PA358&dq=problems+for+Bistable+transistor+circuits&source=bl&ots=A6hnvR5TZc&sig=SDvA5JPA9qEGk-r5D7hSuNJrPOw&sa=X&ei=vhYuUNucDIigyAGC54HwBg&ved=0CB8Q6AEwBQ#v=onepage&q=problems%20for%20Bistable%20transistor%20circuits&f=false

http://books.google.com/books?id=5v5ct06-kbwC&pg=PA385&lpg=PA385&dq=problems+for+Bistable+transistor+circuits&source=bl&ots=Y5TLnWQ-ix&sig=abhsnBtun7VKujj9e7TUaAkxQY4&sa=X&ei=cRcuUNvuIsXDygGvzIHACQ&ved=0CCYQ6AEwBzgK#v=onepage&q=problems%20for%20Bistable%20transistor%20circuits&f=false

http://books.google.com/books?id=oW7T-X_2vvsC&pg=PR9&lpg=PR9&dq=problems+for+monostable+transistor+circuits&source=bl&ots=hDgKrbOniJ&sig=T5vKoIin3rHc5Ug8Y_bK9E8SsYQ&sa=X&ei=zxsuUL6AHOiBywHzqoDYBQ&ved=0CBoQ6AEwBDgK#v=onepage&q=problems%20for%20monostable%20transistor%20circuits&f=false

http://books.google.co.in/books?id=VeZzdpXSIk4C&printsec=frontcover#v=onepage&q&f=false

http://bitsavers.trailing-edge.com/pdf/columbiaUniv/Millman_Pulse_and_Digital_Circuits_1956.pdf

http://www.certified-easy.com/aa.php?isbn=ISBN:8120325966&name=Pulse_and_Digital_Circuits

http://www.certified-easy.com/aa.php?isbn=ISBN:0070606560&name=Pulse_and_Digital_Circuits

http://www.certified-easy.com/aa.php?isbn=ISBN:8131721353&name=Pulse_And_Digital_Circuits

http://www.certified-easy.com/aa.php?isbn=ISBN:8184310730&name=Pulse_And_Digital_Electronics