How to Solve It: A New Aspect of Mathematical Method
John H. Conway & György Pólya
The Coherence of "Gnosticism"
Einar Thomassen
Sylvia Wynter: On Being Human as Praxis
Katherine McKittrick
Facebook and Philosophy: What's on Your Mind?
D. E. Wittkower
Engineering Mathematics: YouTube Workbook
Bookboon.com
The Rough Guide German Phrasebook
Lexus (firm)
Portugese
Tait, Norma de Oliveira