Epoxy modified silicas for HPLC studied by 29Si and 13C solid-state NMR A Tuel, H Hommel, AP Legrand, MF Gonnord, E Mincsovics and AM Siouffi J. Chim. Phys., 89 (1992) 477-488 Published online: 29 May 2017 DOI: 10.1051/jcp/1992890477