Tham khảo Liên_kết_pi

  1. ↑ Streitwieser, Andrew; Heathcock, Clayton H.; Kosower, Edward M. (1992). Introduction to organic chemistry. Heathcock, Clayton H., Kosower, Edward M. (ấn bản 4). New York: Macmillan. tr. 250. ISBN 0024181706. OCLC 24501305. 
  2. ↑ Veillard, A. (1970). “Relaxation during internal rotation ethane and hydrogen peroxyde”. Theoretica chimica acta 18 (1): 21–33. doi:10.1007/BF00533694. 
  3. ↑ Harmony, Marlin D. (1990). “The equilibrium carbon–carbon single‐bond length in ethane”. J. Chem. Phys. 93: 7522–7523. Bibcode:1990JChPh..93.7522H. doi:10.1063/1.459380.