% Not in the source data: doi, abstract, number
@article{si-2001-design-application-methodology,
  author = {{si} and {si} and {si} and {si}},
  title = {{A design and application methodology for hierarchical production planning decision supports systems in an enterprise integration context}},
  journal = {International Journal of Production Economics},
  year = {2001},
  volume = {74},
  pages = {5--20}
}