Oncology. Selected lectures for students and physicians. Edited by V.F. Chekhun, academician of NAS of Ukraine — Кyiv, 2010. — 768 pp. (in Ukrainian)

ERROR: si-captcha.php plugin says GD image support not detected in PHP!

Contact your web host and ask them why GD image support is not enabled for PHP.

ERROR: si-captcha.php plugin says imagepng function not detected in PHP!

Contact your web host and ask them why imagepng function is not enabled for PHP.