A.C. Kolbert, and R.G. Griffin, "Two-Dimensional Spin-Echo Dipolar Sideband Enhancement in Magic Angle Spinning NMR", J. Magn. Reson. 93, 242 (1991).

F. Creuzet, A.E. McDermott, R. Gebhard, K. van der Hoef, M.B. Spijker-Assink, J. Herzfeld, J. Lugtenburg, M.H. Levitt, and R.G. Griffin, "Determination of Membrane Protein Structure with Rotational Resonance NMR: Bacteriorhodopsin", Science 251, 783 (1991).

P. Allen, F. Creuzet, H.J.M. deGroot, and R.G. Griffin, "Apparatus for Low Temperature Magic Angle Spinning NMR," J. Magn. Reson. 92, 614 (1991)

H.J.M. deGroot, S.O. Smith, A.C. Kolbert, J.M.L. Courtin, C. Winkel, J. Lugtenburg, J. Herzfeld, and R.G. Griffin, "Iterative Fitting of MAS Spectra," J. Magn. Reson. 91, 30 (1991).

D.P. Raleigh, E.T. Olejniczak, and R.G Griffin, "Theory of Combined TOSS-Multiple Pulse Scaling Experiments," J. Magn. Reson. 93, 472 (1991). 

A.E. McDermott, L.K. Thompson, C. Winkel, M.F. Farrar, S. Pelletier, J. Lugtenburg, J. Herzfeld, and R.G. Griffin, "Mechanism of Proton Pumping in Bacteriorhodopsin by Solid State NMR:  The Protonation State of Tyrosine in the Light-Adapted and M States", Biochemistry 30, 8366 (1991).

R.G.S. Spencer, K.J. Halverson, M. Auger, A.E. McDermott, R.G. Griffin, and P.T. Lansbury, Jr, "An Unusual Peptide Conformation May Precipitate Amyloid Formation in Alzheimer's Disease: Application of Solid State NMR to the Determination of Protein Secondary Structure," Biochemistry 30, 10382 (1991)

L.C. Bonar, M. Shimizu, J.E. Roberts, R.G. Griffin, and M.J. Glimcher, "Structural and Composition Studies on the Mineral of Newly-Formed Dental Enamel:  A Chemical, X-ray Diffraction and 31P and 1H Nuclear Magnetic Resonance Study", J. Bone Miner. Res. 6, 1167 (1991).

J.E. Roberts, M. Heughebaert, J.-C. Heughebaert, L.C. Bonar, M.J. Glimcher, and R.G. Griffin, "Solid State 31P NMR Studies of the Conversion of Amorphous Tricalcium Phosphate to Apatitic Tricalcium Phosphate", Calcif. Tissue Int. 49, 378 (1991).