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NIH:10.2478/raon-2013-0075
NIH:10.2478/s11535-010-0060-y
NIH:10.2478/s11658-010-0032-2
NIH:10.2478/s13380-013-0120-7
NIH:10.2478/s13380-014-0203-0
NIH:10.2478/s13380-014-0233-7
NIH:10.2478/v10134-010-0017-8
NIH:10.2478/v10136-009-0022-8