Hammarberg, R. 1974. Another Look at Finnish Consonant Gradation. Soviet Finno-Ugric Studies 10. 171–178.
@article{hammarberg1974,
author = {Hammarberg, R.},
journal = {Soviet Finno-Ugric Studies},
pages = {171–178},
title = {Another Look at Finnish Consonant Gradation},
volume = {10},
year = {1974}
}