TY  - BOOK
TI  - UNCRACKABLE? The Collatz Conjecture
PY  - 2016///
PB  - Numberphile
N1  - Acceso libre; Curso: ULAAT; Video
UR  - https://www.youtube.com/watch?v=5mFpVDpKX70&ab_channel=Numberphile
ER  -