Soil arthropods.

Andrés P, Mateos E, Ascaso C (1999) Soil arthropods. In Rodà F, Retana J, Gracia C, Bellot J (eds) Ecology of Mediterranean evergreen oak forests. Springer, Berlin, pp. 341-354.

Ecological risks of the use of sewage sludge as fertilizer in soil restoration: Effects on the soil microarthropod populations.

Andrés P (1999) Ecological risks of the use of sewage sludge as fertilizer in soil restoration: Effects on the soil microarthropod populations. Land Degradation & Development 10:67-77.