http://hi.baidu.com/hieda/blog/item/0e1b4f2a64a7773c5243c128.html A Verilog HDL Primer by J. Bhasker Bk&Hardcover; Published by Star Galaxy Press.ISBN: 0-9656277-4-8 The Verilog Hardware Description Language by Thomas, D . E . / Moorby, Philip R .Fourth EditionPublished by Kluwer Academic PublishersDate Published: 05/1998ISBN: 0792381661