@misc{Kumar_Sudhir_TIMETREE.,
 author={Kumar, Sudhir and Hedges, Blair},
 howpublished={online},
 publisher={Arizona State University},
 publisher={Pennsylvania State University},
 title={TIMETREE. The Timescale of Life},
 type={strona naukowa},
 keywords={biologia, bioróżnorodność, zoologia, botanika},
}