(in alphabetic order)

PHP & MySQL Web Development by Luke Welling, Laura Thomson. ISBN-0672317842. 1

Predicting the Semantic Orientation of Adjectives by Vasileios Hatzivassiloglou and Kathleen R McKeown. Proceedings of the eighth conference on European chapter of the Association for Computational Linguistics, Madrid, 1997, pp. 174-181. 2

Sentiment Polarity Tagging Based on Nearby Words by Harm-Jan Wijnen. 2nd Twente Student Conference on IT, Netherlands, 21st of January, 2005.3

Thumbs Up or Thumbs Down? Semantic Orientation Applied to Unsupervised Classification of Reviews by Peter D Turney. Proceedings of the 40th Annual Meeting of the Association for Computational Linguistics (ACL), Philadelphia, July 2002, pp. 417-424. 4

Using Verbs and Adjectives to Automatically Classify Blog Sentiment by Paula Chesley, Rohini K Srihari, Bruce Vincent and Li Xu. Proceedings of AAAI-2006 Spring Symposium on Computational Approaches to Analyzing Weblogs, Stanford University, CA, March 2006. 5

You can also download the papers here.