Wang, P., Zhang, J. J., Xia, R. X., Shu, B., Wang, M., Wu, Q. and Dong, T. (2011) “Arbuscular mycorrhiza, rhizospheric microbe populations and soil enzyme activities in citrus orchards under two types of no-tillage soil management”, Spanish Journal of Agricultural Research, 9(4), pp. 1307-1318. doi: 10.5424/sjar/20110904-307-10.