1. 1. Kailash Kumar, VinodBhadu, A COMPARATIVE STUDY OF BYG SEARCH ENGINES, 2013, American Journal of Engineering Research (AJER)
   2. NagarajuMamillapally, TrivikramMulukutla, Impact of Meta search Engines on Information Retrieval Effectiveness:A Case Study, 2013, International Journal of Advanced Trends in Computer Science and Engineering
   3. Krishan Kant Lavania, Sapna Jain, Madhur Kumar Gupta, and Nicy Sharma, Google: A Case Study (Web Searching and Crawling), 2013, International Journal of Computer Theory and Engineering
   4. Sushma Malik,A Comparative Study of two major Search Engines – Google Yahoo .http://computerscijournal.org/?p=706
   5. Dirk Lewandowski, New perspectives on Web Search Engine Research, 2012, Bingley: Emerald Group Publishing
   6. Amanda Spink, A User centered approach to evaluating human interaction with web search engines: An Exploratory Study, http://eprints.qut.edu.au
   7. Jan Brophy and David Bawden, Is Google Enough? Comparison of an internet search engine search with academic library resources, 2005, Emerald Group Publishing Limited.