There are only a few peer-reviewed scientific studies that challenge the notion of a significant human warming influence on global climate, and all that have been around for any length of time have been made obsolete by errors discovered in the data they relied on or refuted by other studies.
When seeking contrarian studies, look to read the abstracts and conclusions of the studies before forming an opinion. I often see political websites claim some study argues against the consensus view when a closer look reveals they are misrepresenting the study. For example, some political site might point to a paper that examines solar influence on climate, then making the poor conclusion that the paper shows humans aren't causing global warming, without noting that the paper's conclusion states that solar activity can't explain any warming over the last 50 years.