The following terms were included:
Erdmagnetfeld, "geomagnetisches Feld", "magnetic field of the earth", "Earth's magnetic field", "geomagnetic field", 地磁界
Gaber BP, Schnur JM, Chapman D (eds.): Biotechnological Applications of Lipid Microstructures. Advances in Experimental Medicine and Biology, volume 238; Springer, New York; 321-330; ISBN 978-1-4684-7910-2
Maret G, Boccara N, Kiepenheuer J (eds.): Biophysical Effects of Steady Magnetic Fields. Springer Proceedings in Physics, volume 11; Springer, Berlin ; New York; 99-106; ISBN 978-3-642-71528-0