Key points are not available for this paper at this time.
PHOEBE (PHysics Of Eclipsing BinariEs) is a modeling package for eclipsing binary stars, built on top of the widely used WD program (Wilson applications to real data will be published in follow-up papers. PHOEBE is released under the GNU General Public License, which guarranties it to be free, open to anyone interested to join in on future development.
Prša et al. (Mon,) studied this question.