Yes - this is a big interest of mine. I have assembled many references. Also, there was a new publication listed on ResearchGate very recently, from Robyn Tate (I hope I have spelled her name correctly). She is involved in efforts to standardize the quality of single case experimental designs, and her team developed a measure to rate SCEDs.  You can contact me at [email protected] and I'll send some pdfs and links.  Let us know more about the purpose and context of your question, please. 

Thank you to all who provided resources. Just starting on my dissertation and learning how to research.  Again, thanks.