@misc{numerical+recipes+the+art+of+scientific+computing,
    author = {Press, William H. i Teukolsky, Saul Arno i Vetterling, William T. i Flannery, Brian P.},
    title = {Numerical recipes : the art of scientific computing},
    address = {Cambridge},
    publisher = {Cambridge University Press},
    date = {2020}
}