@article{OHalloran99-sfa,
  author	= {O'Halloran, Kay L.},
  title		= {Towards a Systemic Functional Analysis of Multisemiotic Mathematics Texts},
  journal	= {Semiotica},
  year		= {1999},
  volume	= {124},
  number	= {1/2},
  pages		= {1--29}
}