Google Scholar

You can find it under the More menu option on the main Google search page or, often it will appear as the first option in a routine Google search.

Google offers a useful help page with searching tips.

Google does a fair job keeping track of academic publications of all sorts. There are advanced options available to help you narrow your searches. Your search may also pull up a book or two. If the book has been digitised by Google you can then use Google books to find the text or ideas of interest.

Google also tracks citations, that is papers that cite or reference the paper or book. So if you find an article or book of interest, it is often worth having a look at the papers or books that have cited the paper or book. Papers or books that cite a paper are not necessarily in agreement with the previous publication. These can sometimes help you map the opposing ideas/arguments to your interest, an important thing to do.

Google improved its citations facility in 2011. Unfortunately, access to a particular author's detailed citation data will depend upon whether or not they have agreed to make it public. Not all academics are aware of this change.