Generic concept of the phytoseiids (Acari: Phytoseiidae) according to Athias-Henriot
Tsolakis, H. and Ragusa, S.  Structure of dorsal setae in the two-spotted spide rmite Tetranychus urticae Koch, 1836
Mills, L.R.  A sampling device for soil microarthropods
Auerbach, S.I. and Crossley, D.A., Jr.