1. Bunting, G., Du, Y.H., Krakowski, K.: Spreading speed revisited: analysis of a free boundary model. Netw. Heterog. Media (special issue dedicated to H. Matano) 7, 583–603 (2012).
2. Caffarelli, L., Salsa, S.: A Geometric Approach to Free Boundary Problems, Graduate Studies in Mathematics. American Mathematical Society, Providence (2005)
3. Chen, X.F., Friedman, A.: A free boundary problem arising in a model of wound healing. SIAM J. Math. Anal. 32(4), 778–800 (2000)
4. Chen, X.F., Friedman, A.: A free boundary problem for an elliptic-hyperbolic system: an application to tumor growth. SIAM J. Math. Anal. 35, 974–986 (2003)
5. Crank, J.: Free and Moving Boundary Problem. Clarendon Press, Oxford (1984)