@article{McDougall1923,
  author    = {McDougall, William},
  title     = {Emotion, Instincts of Mammals and of Man: The Instinct of Combat},
  journal   = {Outline of Psychology, New York (Charles Scribner's Sons) 1932, pp. 139-142, 154-157, 330-337.},
  year      = {1923},
  language  = {en}
}