A Note on the Reference Acronyms

In the references that follow, the acronyms within the identifying square brackets follow the AMS BibTeX scheme. Initial letters pertain to the author(s) or editor(s). These are followed by two digits representing the year of publication; a letter may also be appended to distinguish between publications in the same year, e.g. [AB87a], [AB87b]. In the case of papers or books with more than four authors, initial letters from the names of the first three authors are used, followed by a $^\mathbf{+}$ sign, e.g. [ADK+84]. It is also important to note that the references are listed according to the alphabetical order of the acronyms and not according to the alphabetical order of the authors' names.