when inserting a bibliography one choose from multiple of bibliographies.[insert Bibliography]

Suppose, for example, we would like to have three bibliographies, one for books, one for articles, and one for the everything else: In the following example, I am using three references by Donald E. Knuth, a book, an article and an inproceedings type.

Explanation:

the today function returns a valid value without any arguments.

the today function returns the current date based on the computer's date setting and formatted as a date. today takes no parameters, but requires that you use empty parentheses