BALAGUE ET AL.: 'Synthesis of fluorinated telomers, Part 1, Telomerization of vinylidene fluoride with perfluoroalkyl iodides', J. FLOUR CHEM., vol. 70, no. 2, 1995, pages 215 - 223, XP004020759, DOI: doi:10.1016/0022-1139(94)03120-O