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by M.T. Silva Adrián, Pastrana-Martínez L.M., Gomes H.T., Dražić G., Faria J.L.

by Ortega M.F., Rincones M., Elío J., Gutiérrez del Olmo J., Nisi B., Mazadiego L.F., Iglesias L., Vaselli O., Grandia F., García R., De La Vega R., Llamas B.

by C. Couto, I. Pinto, T. Madureira, M.J. Rocha, M.E. Tiritan, J.A. Lopes, Almeida Agostinho A.

by Proias G.T., Larissi I.K., Moustris K.P., Nastos P.T., Paliatsos A.G.

by Llamas Bernardo, Mazadiego, Elío, Ortega, Grandia, Rincones

by Droulia F.E., Matsoukis A.S., Chronopoulou-Sereli A.G., Giannopolitis C.N., Tsiros I.X.

by M. Obaidullah, Dyakov I.V., Peeters L., Bram S., de Ruyck J.

by D. Deligiorgi, K. Philippopoulos, G. Karvounis

by Karagiannidis A.F., Triantafyllou A.G., Karacostas T.S.