J.L. Burdett & M.T. Rogers, Keto-enol tautomerism in beta-dicarbonyls studied by NMR spectroscopy. I. Proton chemical shifts and equilibrium constants of pure compounds, J. Am. Chem. Soc.86: 2105-9, 1964
M.T. Rogers & J.L. Burdett, Keto-enol tautomerism in beta-dicarbonyls studied by NMR spectroscopy. II. Solvent effects on proton chemical shifts and on equilibrium constants, Can. J. Chem.43: 1516-26, 1965
R.S. Macomber, A Complete Introduction to Modern NMR Spectroscopy, 1998 (Baily-Howe: QD96.N8 M3 1998; on reserve in the Cook Library)
Also useful for FT-NMR in general:
R.W. King & K.R. Williams, The Fourier-transform in chemistry Part 1. Nuclear magnetic resonance: Introduction, J. Chem. Ed.66: A213-9 (1989).
R.W. King & K.R. Williams, The Fourier-transform in chemistry Part 2. Nuclear magnetic resonance: The single pulse experiment, J. Chem. Ed. 66: A243-8 (1989).
R.W. King & K.R. Williams, The Fourier-transform in chemistry - NMR: A glossary of NMR terms, J. Chem. Ed.67: A100-5(1989).