Li, C., Cheng, S., Ge, J., Bai, F., Zhang, J., Mann, I., Harris, F., Chien, L.-C., Yan, D., He, T., & Lotz, B. (1999). Double Twist in Helical Polymer "Soft" Crystals. Physical Review Letters. https://doi.org/http://dx.doi.org/10.1103/PhysRevLett.83.4558
Li, Christopher, Stephen Cheng, Jason Ge, Feng Bai, John Zhang, Ian Mann, Frank Harris, Liang-Chy Chien, Donghang Yan, Tianbai He, and Bernard Lotz. 1999. “Double Twist in Helical Polymer ‘Soft’ Crystals”. Physical Review Letters. https://doi.org/http://dx.doi.org/10.1103/PhysRevLett.83.4558.
Li, C., S. Cheng, J. Ge, F. Bai, J. Zhang, I. Mann, F. Harris, L.-C. Chien, D. Yan, T. He, and B. Lotz. Double Twist in Helical Polymer "Soft" Crystals. Physical Review Letters, 29 Nov. 1999, doi:http://dx.doi.org/10.1103/PhysRevLett.83.4558.