Valentin Poénaru

A Glimpse into the Problems of the Fourth Dimension

Valentin Poénaru, V. Poénaru, 2019, Geometry in History.

On geometric group theory

Valentin Poénaru, 2021, Topology and Geometry.

Thurston ’ s work on surfaces

Valentin Poénaru, Albert Fathi, A. Fathi, 2013 .