Design of a Rule Based System Using Structured Query Language. - Umair Abdullah; Mohammad Jamil Sawar; Aftab Ahmed (DASC, 2009)

Performance evaluation of rule-based expert systems: An example from medical billing domain. - Umair Abdullah; Antoni Ligeza; Kashif Zafar (Expert Syst. J. Knowl. Eng., 2017)

Implementing Rule-based Healthcare Edits. - Umair Abdullah; Muhammad Shaheen; Farhan Sabir Ujager (KSII Trans. Internet Inf. Syst., 2022)