Ebbinghaus & Flum (1995). Parys (2014) writes that this undecidability result is well known, and attributes it to Trahtenbrot (1950) on the undecidability of first-order satisfiability for more general classes of finite structures. Ebbinghaus, Heinz-Dieter; Flum, Jörg (1995), Finite Model Theory, Springer Monographs in Mathematics (2nd ed.), Springer, p. 129, doi:10.1007/3-540-28788-4 Parys, Paweł (2014), "First-order logic on CPDA graphs", Computer science—theory and applications, Lecture Notes in Computer Science, vol. 8476, New York: Springer-Verlag, pp. 300–313, doi:10.1007/978-3-319-06686-8_23, MR3218557, S2CID31640587Trahtenbrot, B. A. (1950), "The impossibility of an algorithm for the decision problem for finite domains", Doklady Akademii Nauk SSSR, New Series, 70: 569–572, MR0033784
Lavrov (1963). Lavrov, I. A. (1963), "The effective non-separability of the set of identically true formulae and the set of finitely refutable formulae for certain elementary theories", Algebra i Logika Sem., 2 (1): 5–18, MR0157904
Grohe (2017), pp. 23–27. Grohe, Martin (2017), Descriptive complexity, canonisation, and definable graph structure theory, Lecture Notes in Logic, vol. 47, Cambridge University Press, Cambridge, ISBN978-1-107-01452-7, MR3729479
Grohe (2017), pp. 50–51. Grohe, Martin (2017), Descriptive complexity, canonisation, and definable graph structure theory, Lecture Notes in Logic, vol. 47, Cambridge University Press, Cambridge, ISBN978-1-107-01452-7, MR3729479
Ebbinghaus & Flum (1995). Parys (2014) writes that this undecidability result is well known, and attributes it to Trahtenbrot (1950) on the undecidability of first-order satisfiability for more general classes of finite structures. Ebbinghaus, Heinz-Dieter; Flum, Jörg (1995), Finite Model Theory, Springer Monographs in Mathematics (2nd ed.), Springer, p. 129, doi:10.1007/3-540-28788-4 Parys, Paweł (2014), "First-order logic on CPDA graphs", Computer science—theory and applications, Lecture Notes in Computer Science, vol. 8476, New York: Springer-Verlag, pp. 300–313, doi:10.1007/978-3-319-06686-8_23, MR3218557, S2CID31640587Trahtenbrot, B. A. (1950), "The impossibility of an algorithm for the decision problem for finite domains", Doklady Akademii Nauk SSSR, New Series, 70: 569–572, MR0033784
Ebbinghaus & Flum (1995). Parys (2014) writes that this undecidability result is well known, and attributes it to Trahtenbrot (1950) on the undecidability of first-order satisfiability for more general classes of finite structures. Ebbinghaus, Heinz-Dieter; Flum, Jörg (1995), Finite Model Theory, Springer Monographs in Mathematics (2nd ed.), Springer, p. 129, doi:10.1007/3-540-28788-4 Parys, Paweł (2014), "First-order logic on CPDA graphs", Computer science—theory and applications, Lecture Notes in Computer Science, vol. 8476, New York: Springer-Verlag, pp. 300–313, doi:10.1007/978-3-319-06686-8_23, MR3218557, S2CID31640587Trahtenbrot, B. A. (1950), "The impossibility of an algorithm for the decision problem for finite domains", Doklady Akademii Nauk SSSR, New Series, 70: 569–572, MR0033784