Hetzron, Robert. 1976. Two principles of genetic reconstruction. Lingua 38. 89-108.
@article{jacquesestimative-hetzron76two,
author = {Hetzron, Robert},
journal = {Lingua},
number = {2},
pages = {89-108},
title = {Two principles of genetic reconstruction},
volume = {38},
year = {1976}
}