SpringerLink (Online service), Person, S., & Goodloe, A. E. (2012). NASA formal methods: 4th International symposium, NFM 2012, Norfolk, VA, USA, April 3-5, 2012. Proceedings. Springer Berlin Heidelberg.

SpringerLink (Online service), Suzette Person, and Alwyn E. Goodloe. NASA Formal Methods: 4th International Symposium, NFM 2012, Norfolk, VA, USA, April 3-5, 2012. Proceedings. Berlin, Heidelberg: Springer Berlin Heidelberg, 2012.

SpringerLink (Online service), et al. NASA Formal Methods: 4th International Symposium, NFM 2012, Norfolk, VA, USA, April 3-5, 2012. Proceedings. Springer Berlin Heidelberg, 2012.