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Román, B., Miranda, M. T., Martinez, M., Viciana, J. Julkaisussa Science and Skiing IV (2009) “...educational training...”
Lahajnar, L., Nemec, B. Julkaisussa Science and Skiing IV (2009) “...educational training...”
LeMaster, R. Julkaisussa Science and Skiing IV (2009) “...educational training...”