Apple has created the volume purchase program for businesses and educational institutions to buy apps in larger numbers, with a possible discount. You can register for this program and use it to buy multiple copies of the same app for users within your business or institution.
The program is only available through the Apple iTunes store, and your business or institution needs to be registered for it. In addition to this, it is currently only available in the following countries: Australia, Canada, France, Germany, Italy, Japan, New Zealand, Spain, United Kingdom, and the United States.
If you would like to purchase multiple copies of Papers for iOS, and you are part of a business or educational institution, we recommend you first register with the volume purchase program through Apple to facilitate your purchase.