Robert Abernathy. The problem of linguistic equivalence. Structure of language and its mathematical aspects, Proceedings of symposia in applied mathematics, vol. 12, American Mathematical Society, Providence 1961, pp. 95–98.
L. Jonathan Cohen · Journal of Symbolic Logic · 1966
Robert Abernathy. The problem of linguistic equivalence. Structure of language and its mathematical aspects, Proceedings of symposia in applied mathematics, vol. 12, American Mathematical Society, Providence 1961, pp. 95–98. - Volume 31 Issue 4