@book {17,
	title = {An introduction to Kolmogorov complexity and its applications},
	year = {2008},
	edition = {Springer-Verlag, 1st Edition 1993 (xx+546 pp). 2nd Edition 1997 (xx+637 pp). 3rd Edition 2008 (xx+792 pp). 4th Edition},
	url = {https://www.springer.com/gp/book/9781489984456},
	author = {M. Li and P. Vitanyi}
}
