On the Paradox of Grounded Classes. - Richard Montague (J. Symb. Log., 1955)

On the Definition of 'Formal Deduction'. - Richard Montague; Leon Henkin (J. Symb. Log., 1956)

Remarks on descriptions and natural deduction. - Richard Montague; Donald Kalish (Arch. Math. Log., 1957)

A paradox regained. - David Kaplan; Richard Montague (Notre Dame J. Formal Log., 1960)

Theories Incomparable with Respect to Relative Interpretability. - Richard Montague (J. Symb. Log., 1962)