http://www.dtic.mil/dtic/tr/fulltext/u2/a439395.pdf

http://www.analog.com/library/analogdialogue/archives/43-09/EDCh%208%20filter.pdf

http://www.dtic.mil/dtic/tr/fulltext/u2/634764.pdf

http://books.google.com/books?id=n4KglfxUhoQC&printsec=frontcover#v=onepage&q&f=false

http://books.google.com/books?id=mdLxgXJyKCcC&printsec=frontcover#v=onepage&q&f=false

http://books.google.com/books?id=NuRvHVMuzI4C&pg=PA14&lpg=PA14&dq=chebyshev+filter+book&source=bl&ots=oAkYvuOu1u&sig=X9WfNBs6CY2padI_RlkI9a6iNag&hl=en&sa=X&ei=0OIUUdikFcvGswbK84CwAw&ved=0CE0Q6AEwBjgK#v=onepage&q=chebyshev%20filter%20book&f=false

http://books.google.com/books?id=8fkwxvh7TCIC&pg=PA323&lpg=PA323&dq=improved+version+of+the+inverse+chebyshev+filter&source=bl&ots=ywuPFo9Xbg&sig=6wQ_LQrpM8pxHJUm6HkCWqdUhjc&hl=en&sa=X&ei=gu8UUZvRKMWptAbs-YCQDw&ved=0CDcQ6AEwAjgK#v=onepage&q=improved%20version%20of%20the%20inverse%20chebyshev%20filter&f=false