BibTeX
@ARTICLE{
         Lill1970AAm,
       AUTHOR = "Lill, S. A.",
       TITLE = "Algorithm 46: {A} modified {D}avidon method for finding the minimum of a function
         using difference approximation for derivatives",
       JOURNAL = "The Computer J.",
       VOLUME = "13",
       YEAR = "1970",
       PAGES = "111--113",
       NOTE = "14 (170), p. 106",
       REFERRED = "[Garcia1991ASf]."
}