* Lovelock, James (2001) “Gaia: the practical science of planetary medicine” (Oxford Uni Press) ISBN 0-19-521674-1* Volk, Tyler (1997) “Gaia's Body: Towards a Physiology of Earth” (Copernicus Books) ISBN 978-0-387-98270-0* McMenamin Mark A.S. & Dianna L. S. McMenamin (1996) “Hypersea: Life on Land” (Columbia Uni Press) ISBN 0-231-07531-6* Zavarzin, G. A.
* Lovelock, James (2001) "Gaia: the practical science of planetary medicine" (Oxford Uni Press) ISBN 0-19-521674-1* Volk, Tyler (1997) "Gaia's Body: Towards a Physiology of Earth" (Copernicus Books) ISBN 978-0-387-98270-0* McMenamin Mark A.S. & Dianna L. S. McMenamin (1996) "Hypersea: Life on Land" (Columbia Uni Press) ISBN 0-231-07531-6* Zavarzin, G. A.