http://www.dista.unibo.it/~bittelli/materiale_lettura_fisica_terreno/marquardt_63.pdf
Real world Tony stark: Elon Musk
Elon Musk started Paypal at 23 and later started multiple like SpaceX (Musk’s rocket-building company), now Tesla Motors. Check out his bio at http://goo.gl/O3qMd5