Библиографическая ссылка:
Маркович Л.А., Манько В.И. Separability and entanglement in the Hilbert space reference frames related through the generic unitary transform for four level system // International Journal of Theoretical Physics. 2018. С. 1-19 https://link.springer .com/article/10.1007/s10773-017-3658-2?wt_mc=Internal.Event.1.SEM.ArticleAuthorOnlineFi.