@article{1103039458, author = {Lyndon, Roger C.}, title = {An interpolation theorem in the predicate calculus.}, journal = {Pacific J. Math.}, volume = {9}, number = {4}, year = {1959}, pages = { 129-142}, language = {en}, url = {http://dml.mathdoc.fr/item/1103039458} }
Lyndon, Roger C. An interpolation theorem in the predicate calculus.. Pacific J. Math., Tome 9 (1959) no. 4, pp. 129-142. http://gdmltest.u-ga.fr/item/1103039458/