Top of the page 3. The acronym is the abbrevation of the author of a book. If there is more than one author, the acronym contains the first cited author. If a book describes the work of for example Simon Vestdijk, and the book is written by J. Janssens, then the first acronym is refers to the person covered in the book, while the second acronym is refers to the author. Top of the page 4.
Filing is done numerically.