@misc{thermal+calculations+and+testing+of+external+rotor+permanent+magnet+machine,
    author = {Szczypior, Jan i Jakubowski, Rafał},
    title = {Thermal calculations and testing of external rotor permanent magnet machine},
    journal = {Technical Transactions},
    address = {Kraków},
    publisher = {<a href=\"http://www.wydawnictwo.pk.edu.pl/\" target=\"_blank\">Wydawnictwo PK</a>},
    date = {2015},
    number = {Y. 112, iss. 1-E}
}