Basin, David Programming Logics, MPI for Informatics, Max Planck Society;
Matthews, Seán Programming Logics, MPI for Informatics, Max Planck Society;
https://rdcu.be/dvrvR (Publisher version)
Basin, D., & Matthews, S. (1993). A Conservative Extension of First-order Logic and its Applications to Theorem Proving. In R. K. Shyamasundar (Ed.), Foundations of Software Technology and Theoretical Computer Science (pp. 151-160). Berlin, Germany: Springer. doi:10.1007/3-540-57529-4_50.