A Family of Incomplete Relational Database Models. - Adegbemiga Ola; Gultekin Özsoyoglu (VLDB, 1989)

Database Systems for Programmable Logic Controllers. - Gultekin Özsoyoglu; Wen-Chi Hou; Adegbemiga Ola (SSDBM, 1990)

A Scientific DBMS for Programmable Logic Controllers. - Gultekin Özsoyoglu; Wen-Chi Hou; Adegbemiga Ola (IEEE Data Eng. Bull., 1990)

Relational Databases with Exclusive Disjunctions. - Adegbemiga Ola (ICDE, 1992)