@article{brisk,
    author  = "Stefan, Leutenegger and Margarita, Chli and Roland, Y.Siegwart",
    title   = "{BRISK} : Binary Robust Invariant Scalable Keypoints",
    year    = "2011",
}

@online{surf,
  author = "OpenCV 3.0.0-dev documentation",
  title = "Introduction to {SURF} (Speeded-Up Robust Features)",
  url = "http://docs.opencv.org/trunk/doc/py_tutorials/py_feature2d/py_surf_intro/py_surf_intro.html",
  urldate = "2015-03-12"
}

@online{sift,
  author = "OpenCV 3.0.0-dev documentation",
  title = "Introduction to {SIFT} (Scale-Invariant Feature Transform)",
  url = "http://docs.opencv.org/trunk/doc/py_tutorials/py_feature2d/py_sift_intro/py_sift_intro.html",
  urldate = "2015-03-12"
}

@online{license,
  author = "Open Source Initiative",
  title = "The zlib/libpng License (Zlib)",
  url = "http://opensource.org/licenses/Zlib",
  urldate = "2015-03-12"
}

@online{spline,
    author="Jana Proch\'azkov\'a",
    title="DERIVATIVE OF B-SPLINE FUNCTION",
    url="http://mat.fsv.cvut.cz/gcg/sbornik/prochazkova.pdf",
    urldate="2015-03-12"
}