1960Language change and linguistic reconstruction. University of Chicago Press.
Labov, W.
1981Resolving the Neogrammarian controversy. Language 57: 267–308.
Meillet, A.
1967The comparative method in historical linguistics. Champion.
Osthoff, H. & K. Brugmann
1878Preface to: Morphologische Untersuchungen auf dem Gebiet der Indogermanischen Sprachen 1. In W. P. Lehmann (ed.) A reader in 19th century historical Indo-European linguistics. Indiana University Press.