Improved selectivity estimator for XML queries based on structural synopsis. - Salahadin Mohammed; El-Sayed M. El-Alfy; Ahmad F. Barradah (World Wide Web, 2015)

XHQE: A hybrid system for scalable selectivity estimation of XML queries. - El-Sayed M. El-Alfy; Salahadin Mohammed; Ahmad F. Barradah (Inf. Syst. Frontiers, 2016)

Selectivity estimation of extended XML query tree patterns based on prime number labeling and synopsis modeling. - Salahadin Mohammed; Ahmad F. Barradah; El-Sayed M. El-Alfy (Simul. Model. Pract. Theory, 2016)