The 2 references without contexts in paper I. Komarov G., I. Poddubnaya V., M. Nemtsova V., N. Levitskaya V., V. Lewitzki , V. Lewitzki, И. Комаров Г., И. Поддубная В., М. Немцова В., Н. Левицкая В. (2015) “CUP-СИНДРОМ: СОВРЕМЕННЫЙ ВЗГЛЯД НА ПРОБЛЕМУ (ОБЗОР ЛИТЕРАТУРЫ) // CUP-SYNDROME: THE PRESENT VIEW OF THE PROBLEM (A REVIEW OF LITERATURE)” / spz:neicon:modonc:y:2013:i:1:p:45-49

14
Greco FA. Cancer of unknown primary site: evolving understanding and management of patients. Clin Advanc Hematol Oncol 2012; 10 (8): 518–24.
(check this in PDF content)
47
Wouw AJ, Jansen RL, Griffioen AW. Clinical and Immunohistochemical analysis of patients with unknown primary tumour. A search for prognostic factors in UPT. Anticancer Research 2004; 24: 297–302.
(check this in PDF content)