NEXO Nonsingular Estimator for Exoplanet Orbits NEXO requires the following third-party libraries: LAPACK: https://www.netlib.org/lapack/ QUADRULE: https://people.math.sc.edu/Burkardt/f_src/quadrule/quadrule.html STROUD: https://people.math.sc.edu/Burkardt/f_src/stroud/stroud.html