“…Cressie (1993;Ripley, 2004;Wackernagel, 2003). The measured variable in spatial analysis might stand for percentage of either Ni, Fe or Au in mining exploration, see e.g., Tahir (2010;Somayasa et al, 2015a;2015b;Somayasa and Wibawa, 2015;Somayasa et al, 2016) or the incidence rates for breast cancer, cf. MacNeill et al (1994).…”