Announcement
Digital Object Identifier
Academic Press, a Harcourt Science and Technology Company, supports Digital Object Identifiers (DOIs) as
unique identifiers for articles. We will print a DOI that replaces and incorporates the Article Identifier on the title
page of each article. DOIs can be used to find articles on the IDEAL online library and will be particularly useful
in the near future for identifying and citing articles published online without volume or issue information.
Further details can be found in the instructions to authors.