Widyastuti, R. (2005) “Population Dynamics of Microarthropods (Oribatida and Collembola) in Rainfed Paddy Field Ecosystem in Pati, Central Java”, Jurnal Ilmu Tanah dan Lingkungan, 7(1), pp. 11–14. doi:10.29244/jitl.7.1.11-14.