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2. Stability of response characteristics of a Delphi panel: Application of bootstrap data expansion;Akins;BMC Medical Research Methodology,2005
3. The outdoor education umbrella: A metaphoric model to conceptualize outdoor experiential learning methods;Bisson,1996
4. Multidimensional self concept scale: MSCS;Bracken,1992
5. TMA: test di valutazione multidimensionale dell’autostima;Bracken,2003