A reference provides access to an article or book. It lists the authors, title, city of publication , publisher, page numbers, and date. See the ACM Digital Library for articles published by the ACM. See the IEEE Computer Society Digital Library for articles published by the IEEE.
Thesa defines an abbreviated name for each reference. The name consists of the first four letters of the first author's last name followed by the author's initials and date of publication. The initials are capitalized. The date consists of a one or two digit month and a four digit year separated by an underscore. The date may be followed by a single letter if multiple references would otherwise have the same name. For informal notes, the reference is the author's initials.
A reference may have multiple sources. If so, the page numbers for quotations may come from the alternative source.
If a page number is followed by '+', the previous quotation had two or more titles.
The bottom of the web page records when and who collected the quotation. The earliest date in Thesa is 1980, indicating notes collected from 1974 to 1980. The first collection of quotations was made with slips of paper from a manual typewriter, and sorted into glycene envelopes. Initially, the notes were cryptic. I soon discovered that a quotation was a better record of an idea. Over the years, the average length of quotation has increased.