(1)
Filippidis, A.; Godelitsas, A.; Kantiranis, N.; Gamaletsos, P.; Tzamos, E.; Filippidis, S. Neutralization of Sludge and Purification of Wastewater from Sindos Industrial Area of Thessaloniki (Greece) Using Natural Zeolite. geosociety 2013, 47, 920-926.