参考文献

Benisvy, Laurent; Bill, Eckhard; Blake, Alexander J.; Collison, David; Davies, E. Stephen; Garner, C. David; Guindy, Christina I.; McInnes, Eric J. L.; McArdle, Graeme; McMaster, Jonathan; Wilson, Claire; Wolowska, Joanna Dalton Transactions, 2004 , # 21 p. 3647 - 3653