TY - RPRT TI - Spin-1/2 and beyond: a perspective in solid state NMR spectroscopy. AU - L Frydman PY - 2001 DO - 10.1146/annurev.physchem.52.1.463 UR - https://pubmed.ncbi.nlm.nih.gov/11326072/ ID - 11326072 ER -