You will find valuable research in work done by researchers and published in a thesis. A thesis is the work done at a master's level or working toward a Ph.D. and often referred to as a dissertation.
Author. Title of Thesis. Level of Thesis, Degree-Granting University, Location of University, Date of Completion.
Thoman, J. W., Jr. Studies of Molecular Deactivation: Surface-Active Free Radicals and S(O)para-difluorobenzene. Ph.D. Dissertation, Massachusetts Institute of Technology, Cambridge, MA, 1987.
Gehring, A. PhD. Dissertation, Harvard University, 1998.