Theoretical Studies of Short Polyproline Systems: Recalibration of a Molecular Ruler

Theoretical Studies of Short Polyproline Systems: Recalibration of a Molecular Ruler, Elena Dolghih, Wilfredo Ortiz, Seonah Kim, Brent P. Krueger, Jeffrey L. Krause, and Adrian E. Roitberg, J. Phys. Chem. A 113, 4639-4646 (2009).