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@string{JFP="J. Functional Programming"}
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@article{MuellerNvOS99,
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author=
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{Olaf M{\"u}ller and Tobias Nipkow and Oheimb, David von and Oskar Slotosch},
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title={{HOLCF = HOL + LCF}},journal=JFP,year=1999,volume=9,pages={191--223}}
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