@article{KleinpeterLaemmermannKuehn2011,
  author    = {Erich Kleinpeter and Anica Laemmermann and Heiner K{\"u}hn},
  title     = {Synthesis and NMR spectra of the syn and anti isomers of substituted cyclobutanes-evidence for steric and spatial hyperconjugative interactions},
  journal   = {Tetrahedron},
  volume    = {67},
  number    = {14},
  pages     = {2596 -- 2604},
  doi       = {10.1016/j.tet.2011.02.012},
  year      = {2011},
}