1. The Principles of Nuclear Magnetism;Abragam,1961
2. Introduction into Solid State NMR Spectroscopy;Duer,2004
3. Multidimensional Solid-State NMR and Polymers;Schmidt-Rohr,1994
4. G. Brunklaus, H.W. Spiess, H. Eckert, in Modern Methods in Physical Chemistry, First Edition. R. Schäfer, P.C. Schmidt, eds., Wiley-VCH Verlag GmbH & Co., Weinheim, 2012, p. 87–158 and references therein.