https://www.birmingham.ac.uk/schools/law/courses/research/research-proposal.aspx
https://libguides.usc.edu/writingguide/researchproposal
https://www.westminster.ac.uk/study/postgraduate/research-degrees/entry-requirements/how-to-write-your-research-proposal
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5037942/