@misc{using+concavity+index+for+manufacturing+feature+recognition,
    author = {Pobożniak, Janusz},
    title = {Using concavity index for manufacturing feature recognition},
    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. 7-B}
}