In the printing industry, in cases where odd numbers appear on verso pages and even numbers on recto pages, this is referred to as non-traditional folios (in the past, it had been referred to as Chinese folios, however this term has fallen out of favor in recent years).
When publishers wish to distinguish between the front matter and the body, the initial title pages are blind folios, the front matter is numbered using lower-case Roman numerals (i, ii, iii...) and the first page of the body or main content begins with 1.
Most citation systems call for the identification of the page number from which a quote or point is drawn.
[9] In the book Humble Pi by mathematics communicator and YouTuber Matt Parker, the book uses a page numbering scheme where the pages count backwards from 314 to 0, referencing the approximation of 3.14 for the mathematical constant pi (π).
[10] E-books and other electronic documents published in a non-reflowable format such as PDF are normally paginated and numbered in the same way as their printed counterparts.