1. Sampling Techniques;Cochran,1977
2. Geostatistiche Analyse des Stichprobenfehlers systematischer Stichproben;Jost,1993
3. Geometrical Probability;Kendall,1963
4. On the theory of systematic sampling. I;Madow;Ann. Math. Stat.,1944
5. Some Aspects of Two Dimensional Sampling in Forestry;Matérn,1973