https://acikders.ankara.edu.tr/pluginfile.php/119901/mod_url/intro/OPZ212%2012.%20hafta%20Thomas%20Soketi%20%C3%9Cretimi%2C%20Yan%20Bar%20Ba%C4%9Flant%C4%B1s%C4%B1%20%28devam%C4%B1%29%20kopyas%C4%B1.pdf