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}

@article{Hardy2006,
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   year={2006}
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@ARTICLE{Monaghan1985,
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  journal = {\aap},
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}

@ARTICLE{Price2007,
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}

@ARTICLE{Dehnen2001,
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}

@ARTICLE{Hernquist1989,
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}

@Article{Wendland1995,
author="Wendland, Holger",
title="Piecewise polynomial, positive definite and compactly supported radial functions of minimal degree",
journal="Advances in Computational Mathematics",
year="1995",
volume="4",
number="1",
pages="389--396",
abstract="We construct a new class of positive definite and compactly supported radial functions which consist of a univariate polynomial within their support. For given smoothness and space dimension it is proved that they are of minimal degree and unique up to a constant factor. Finally, we establish connections between already known functions of this kind.",
issn="1572-9044",
doi="10.1007/BF02123482",
url="http://dx.doi.org/10.1007/BF02123482"
}



@article{Greengard1987,
title = "A fast algorithm for particle simulations",
journal = "Journal of Computational Physics",
volume = "73",
number = "2",
pages = "325 - 348",
year = "1987",
note = "",
issn = "0021-9991",
doi = "http://dx.doi.org/10.1016/0021-9991(87)90140-9",
url = "http://www.sciencedirect.com/science/article/pii/0021999187901409",
author = "L Greengard and V Rokhlin",
}

@article{Cheng1999,
title = "A Fast Adaptive Multipole Algorithm in Three Dimensions",
journal = "Journal of Computational Physics",
volume = "155",
number = "2",
pages = "468 - 498",
year = "1999",
note = "",
issn = "0021-9991",
doi = "http://dx.doi.org/10.1006/jcph.1999.6355",
url = "http://www.sciencedirect.com/science/article/pii/S0021999199963556",
author = "H. Cheng and L. Greengard and V. Rokhlin",
keywords = "Laplace equation",
keywords = "translation operators",
keywords = "fast multipole method",
keywords = "adaptive algorithms"
}


@ARTICLE{Dehnen2000,
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    title = "{A Very Fast and Momentum-conserving Tree Code}",
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}

@ARTICLE{Dehnen2002,
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   adsurl = {http://adsabs.harvard.edu/abs/2002JCoPh.179...27D},
  adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}



