for the few of us.

S-C. Mu and R. S. Bird, Theory and applications of inverting functions as folds. In Science of Computer Programming Vol. 51 Special Issue for Mathematics of Program Construction 2002, pp. 87-116, 2003.
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S-C. Mu and R. S. Bird, Rebuilding a tree from its traversals: a case study of program inversion. In The First Asian Symposium on Programming Languages and Systems, LNCS 2895, pp. 265-282, Bejing, 2003.
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S-C. Mu, A Calculational Approach to Program Inversion. D.Phil Thesis. Oxford University Computing Laboratory. March 2003
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S-C. Mu and R. S. Bird, Inverting functions as folds. In Sixth International Conference on Mathematics of Program Construction, Dagstuhl, Germany, July 2002
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S-C. Mu and R. S. Bird, On building trees with minimum height, relationally. In First Asian Workshop on Programming Languages and Systems, Singapore, December 2000.
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S-C. Mu, Algebraic Methods for Optimisation Problems. Transfering dissertation.