TY - JOUR TI - Liquefaction of pretreated Turkish coals with microwave energy AU - ZERVENT, R. AU - YAĞMUR, E. AU - ŞİMŞEK, E.H. AU - TOĞRUL, T. JO - Sigma Journal of Engineering and Natural Sciences PY - 2006 VL - 24 SP - 122 EP - 131 DO - ER -