Further Reading

Programming C#, Third Edition by Jesse Liberty , O'Reilly. ISBN: 0596004893.

The Applied Microsoft .NET Framework Programming in C# Collection, Microsoft Press. ISBN: 0735619751.

Mastering Regular Expressions, Second Edition by Jeffrey Friedl , O'Reilly. ISBN: 0596002890.

Regular Expression Pocket Reference by Tony Stubblebine , O'Reilly. ISBN: 059600415X.