Periodic DFT and High-Resolution Magic-Angle-Spinning (HR-MAS) <sup>1</sup>H NMR Investigation of the Active Surfaces of MgCl<sub>2</sub>-Supported Ziegler−Natta Catalysts. The MgCl<sub>2</sub> MatrixVincenzo Busico, Valeria Castelli, Francesco Cutillo et al.|The Journal of Physical Chemistry C|2008Cited by 138