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Husslein, T. and Morgenstern, Ingo and Newns, D. M and Pattnaik, P. C. and Singer, J. M. and Matuttis, H. G. (1996) Quantum Monte Carlo evidence for d-wave pairing in the two-dimensional Hubbard model at a van Hove singularity. Physical Review B (PRB) 54 (22), pp. 16179-16182.
Frick, M. and Pattnaik, P. C. and Morgenstern, Ingo and Newns, D. M and Von der Linden, Wolfgang (1990) Monte Carlo study of superconductivity in the three-band Emery model. Physical Review B (PRB) 42 (4), pp. 2665-2668.