helpful links for distribution

http://www.mathnet.ru/php/archive.phtml?wshow=paper&jrnid=znsl&paperid=7090&option_lang=rus				#article_distr
https://habr.com/ru/post/685582/			#habr
https://github.com/AANazarov/MyModulePython		#MyModulePython
https://docs.scipy.org/doc/scipy/reference/generated/scipy.stats.epps_singleton_2samp.html		#test this test vs ks_2samp

https://lifelines.readthedocs.io/en/latest/lifelines.utils.html		#survival of func