Interaction of methotrexate, an anticancer agent, with copper(II) ions : coordination pattern, DNA-cleaving properties and cytotoxic studies / Nagaj Justyna, Kołkowska Paulina, Bykowska Aleksandra, Komarnicka Urszula K., Kyzioł Agnieszka , Jeżowska-Bojczuk Małgorzata // Medicinal Chemistry Research. - 2015 vol. 24 no. 1, p. 115-123. - ISSN 1054-2523. - eISSN 1554-8120. - https://link.springer.com/content/pdf/10.1007%2Fs00044-014-1074-1.pdf