1. The nature of the chemical bond and the structure of molecules and crystals: an introduction to modern structural chemistry;Pauling,1960
2. Proceedings of Robert A. Welch conference on chemical res. XXVI;England,1982
3. The molecular conformations of polytetrafluoroethylene: forms II and IV;Clark;Polymer,1999
4. Crystal structure of poly(tetrafluoroethylene) homo- and copolymers in the high pressure phase