Salzgeber, Jonas (Nombre personal)

The little book of Stoicism, 2019: title page (Jonas Salzgeber)

Medium Corporation website, via www, 8 July 2019 (Jonas Salzgeber; Author of The little book of Stoicism and blogger specializing in the application of Stoic philosophy & co-founder of www.njlifehacks.com)

The bookselfblog website, via www, 8 July 2019 (Twenty-seven years old and hailing from Thun, Switzerland, Jonas Salzgeber is the author of The little book of Stoicism and blogs for a small army of remarkable people at njlifehacks.com.)

Facebook, 8 July 2019 (Jonas Salzgeber; Went to Gymnasium Thun Schadau; Went to Universität Bern; posts in German)