BibTeX
@ARTICLE{
         Squire1998UCV,
       author = "Squire, William and Trapp, George",
       title = "Using Complex Variables to Estimate Derivatives of Real Functions",
       journal = "SIAM Review",
       volume = "40",
       number = "1",
       pages = "110--112",
       year = "1998",
       doi = "10.1137/S003614459631241X",
       url = "https://doi.org/10.1137/S003614459631241X",
       ad_theotech = "Complex Step Differentiation"
}