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Di Salvo, Valter and Carmont, Michael R. and Maffulli, Nicola (2011) Football officials activities during matches: a comparison of activity of referees and linesmen in European, Premiership and Championship matches. M.L.T.J. Muscles, Ligaments and Tendons Journal, 1 (3). pp. 106-111. ISSN 2240-4554