@article{Halliday63-theory,
  author	= {Halliday, Michael A. K.},
  year		= {1963},
  title		= {Class in relation to the axes of chain and choice in language},
  journal	= {Linguistics},
  volume	= {2},
  pages		= {5--15},
  note		= {Reprinted in abbreviated form in Gunther R. Kress (ed.)(1976) \em Halliday: system and function in language, London: Oxford University Press, pp84-87}
}