Silvestri, Davide and Gagliardi, Mariacristina and Cristallini, Caterina and Barbani, Niccoletta and Giusti, Paolo  Different composition poly(methyl methacrylate-co-butyl methacrylate) copolymers through seeded semi-batch emulsion polymerization.  Polymer Bulletin, 63 (3).  pp. 423-439.  ISSN 0170-0839      (2009)