1. Cement Regulations for Concrete Structures;Public Works Administration Dept of Materials;Decree 29-2-90,1980
2. Fly ash and its utilization in hydraulic cement;Liatis;Technica ChroniKa,1962
3. Reserches helleniques sur l'amelioration descendres volantes de lignite on de houille en vue de leur utilisation en cimenterie;Zlatanos;Ciment, Beton, Rev. Mat. Constr.,1976
4. Physical properties and parameters concerning fly ashes of Ptolemaida and Magalopolis;Tsimas,1977
5. Research on Utilization of Fly Ash of Power Station of Ptolemaida;Papadopoulos,1975