title: the intrinsic problems of structural heterogeneity and an approach to their solution. authors: theo härder , joachim thomas , günter sauter. venue: vldb j.. year: 1999
title: the intrinsic problems of structural heterogeneity and an approach to their solution. authors: theo h &#228; rder , g &#252; nter sauter , joachim thomas. venue: the vldb journal -- the international journal on very large data bases. year: 1999