However , recent interdisciplinary studies which borrow concepts from biological studies , especially gene mapping , have proved to produce more sophisticated analytical tools and more trustful results .
Earlier methods such as lexicostatistics and glottochronology have been proven to be premature and inaccurate .
Recent interdisciplinary studies which borrow concepts from biological studies , especially gene mapping , have proved to produce more sophisticated analytical tools and more trustful results .
Earlier methods such as lexicostatistics and glottochronology have been proven to be premature and inaccurate .