Samia Challal. Regularity of the Free Boundary in $div(a(x) \nabla u(x,y) )= -(h(x)\gamma(u))_x$ with $h^\prime (x)<0$. Int. J. Math. And Appl. [Internet]. 2021 Dec. 15 [cited 2024 Apr. 25];9(4):1-11. Available from: http://ijmaa.in/index.php/ijmaa/article/view/23