@inproceedings{kd-backtrack,
    editor = {M.- A. Otaduy and O. Sorkine},
    booktitle = {Eurographics 2013 --- Short Papers},
    year = {2013},
    issn = {1017-4656},
    address = {Girona, Spain},
    publisher = {Eurographics Association},
    author = {Bruce Merry and James Gain and Patrick Marais},
    title = {Accelerating kd-tree Searches for all $k$-nearest Neighbours},
    pages = {37--40}
}

@techreport{kd-backtrack-techrep,
    author = {Bruce Merry and James Gain and Patrick Marais},
    title = {Accelerating kd-tree Searches for all $k$-nearest Neighbours},
    year = {2013},
    month = {January},
    number = {CS13-01-00},
    institution = {Department of Computer Science, University of Cape Town}
}