@article{reyotero2014ipolSift,
    title   = {{Anatomy of the SIFT Method}},
    author  = {Rey Otero, Ives and Delbracio, Mauricio},
    journal = {{Image Processing On Line}},
    volume  = {4},
    pages   = {370--396},
    year    = {2014},
    doi     = {10.5201/ipol.2014.82},
}
% if your bibliography style doesn't support doi fields:
    note    = {\url{http://dx.doi.org/10.5201/ipol.2014.82}}