A COMPARATIVE STUDY OF n-HEXANE ISOMERIZATION OVER SOLID ACIDS CATALYSTS: SULFATED AND PHOSPHATED ZIRCONIA. - Stojkovic, N.; Vasic, M.; Marinkovic, M.; Randjelovic, M.; Purenovic, M.; Putanov, P.; Zarubica, A. (Chemical Industry & Chemical Engineering Quarterly, 2012)