University of Massachusetts at Amherst
Patent: US5032669 A1, 1991 ;

3M Innovative Properties Company; Yang, Jie; Karim, Naimul; Olson, David B.; Jones, Todd D.; Jacobs, Dwight W.
Patent: US8389599 B2, 2013 ;
Location in patent: Page/Page column 26 ;

Rajadurai, Raj; Padmanabhan, Ramar; Ananthan, Sarkkarai
Medicinal Chemistry Research, 2013 , vol. 22, # 9 p. 4164 - 4172

Pearson,D.P.J. et al.
Journal of the Chemical Society, Perkin Transactions 1: Organic and Bio-Organic Chemistry (1972-1999), 1979 , p. 3113 - 3126