by Kopanakis I., Lydakis–Simantiris N., Katsivela E., Pentari D., Zarmpas P., Mihalopoulos N., Lazaridis M.

by P. Stathi, Papadas I.T., Tselepidou A., Deligiannakis Y.

by Amdouni R.

by Georgaka A., Spanos N.