@article{efimov:plb,
  author  = {Efimov, V.},
  title   = {Energy levels arising from resonant two-body forces in a three-body system},
  journal = {Phys. Lett. B},
  volume  = {33},
  pages   = {563},
  year    = {1970}
}

@article{hammer:07a,
  author  = {Hammer, H.-W. and Platter, L.},
  title   = {Universal properties of the four-body system with large scattering length},
  journal = {Eur. Phys. J. A},
  volume  = {32},
  pages   = {113},
  year    = {2007}
}

@article{stecher:09a,
  author  = {von Stecher, J. and D'Incao, J. P. and Greene, C. H.},
  title   = {Signatures of universal four-body phenomena and their relation to the {Efimov} effect},
  journal = {Nat. Phys.},
  volume  = {5},
  pages   = {417},
  year    = {2009}
}

@article{deltuva:10c,
  author  = {Deltuva, A.},
  title   = {{Efimov} physics in bosonic atom-trimer scattering},
  journal = {Phys. Rev. A},
  volume  = {82},
  pages   = {040701},
  year    = {2010}
}

@article{deltuva:11a,
  author  = {Deltuva, A.},
  title   = {Shallow {Efimov} tetramer as inelastic virtual state and resonant enhancement of the atom-trimer relaxation},
  journal = {Europhys. Lett.},
  volume  = {95},
  pages   = {43002},
  year    = {2011}
}

@article{yamashita:06a,
  author  = {Yamashita, M. T. and Tomio, L. and Delfino, A. and Frederico, T.},
  title   = {Four-boson scale near a {Feshbach} resonance},
  journal = {Europhys. Lett.},
  volume  = {75},
  pages   = {555},
  year    = {2006}
}

@article{blume:00a,
  author  = {Blume, D. and Greene, C. H.},
  title   = {Monte {Carlo} hyperspherical description of helium cluster excited states},
  journal = {J. Chem. Phys.},
  volume  = {112},
  pages   = {8053},
  year    = {2000}
}

@article{deltuva:ef,
  author  = {Deltuva, A. and Lazauskas, R. and Platter, L.},
  title   = {Universality in four-body scattering},
  journal = {Few-Body Syst.},
  volume  = {51},
  pages   = {235},
  year    = {2011}
}

@article{lazauskas:he,
  author  = {Lazauskas, R. and Carbonell, J.},
  title   = {Description of {He}$_4$ tetramer bound and scattering states},
  journal = {Phys. Rev. A},
  volume  = {73},
  pages   = {062717},
  year    = {2006}
}

@article{deltuva:11b,
  author  = {Deltuva, A.},
  title   = {Universality in bosonic dimer-dimer scattering},
  journal = {Phys. Rev. A},
  volume  = {84},
  pages   = {022703},
  year    = {2011}
}

@article{deltuva:12a,
  author  = {Deltuva, A.},
  title   = {Momentum-space calculation of four-boson recombination},
  journal = {Phys. Rev. A},
  volume  = {85},
  pages   = {012708},
  year    = {2012}
}