1 Erratum to: Appl Magn Reson (2012) 43:43–58 DOI 10.1007/s00723-012-0367-0

Due to a processing error, the following References are incorrect:

References 7, 8, 11, 13–15, 17, 18 and 21.

The correct References are given below:

7. C.D. Jeffries, Phys. Rev. 117, 1056 (1960)

8. C.F. Hwang, D.A. Hill, Phys. Rev. Lett. 18, 110–112 (1967)

11. K.-N. Hu, H. Yu, T. Swager, R.G. Griffin, J. Am. Chem. Soc. 126, 10844–10845 (2004)

13. C. Song, K.-N. Hu, C.-G. Joo, T.M. Swager, R.G. Griffin, J. Am. Chem. Soc. 128, 11385–11390 (2006)

14. C. Ysacco, E. Rizzato, M.-A. Virolleaud, H. Karoui, A. Rockenbauer, F. Le Moigne, D. Siri, O. Ouari, R.G. Griffin, P. Tordo, Phys. Chem. Chem. Phys. 12, 5841–5845 (2010)

15. Y. Hovav, A. Feintuch, S. Vega, J. Magn. Reson. 214, 29–41 (2012)

17. N.M. Krylov, N.N. Bogoliubov, Introduction to Nonlinear Mechanics. (Princeton University Press, Princeton, 1947)

18. N.N. Bogoliubov, Y.A. Mitropolsky, Asymptotic Methods in the Theory of Non-Linear Oscillations. (Hindustan Publishing Corporation, Dehli, 1961)

21. M.H. Levitt, L. Di Bari, Phys. Rev. Lett. 69, 3124–3127 (1992)