Affiliation: | (1) Nuclear Centre, Faculty of Mathematics and Physics, Charles University, V Holeovikách 2, 180 00 Praha 8, Czech Republic;(2) Institute of Geology, Czech Acad. Sci., Rozvojova 162, 160 00 Praha 6, Czech Republic;(3) Department of Mathematics, Faculty of Nuclear Sciences and Physical Engineering, Czech Technical University, Trojanova 13, 120 00 Praha 2, Czech Republic |