@misc{investigation+of+hardened+tool+steel+turning+with+cbn+inserts,
    author = {Zębala, Wojciech i Siwiec, Jakub},
    title = {Investigation of hardened tool steel turning with CBN inserts},
    journal = {Development in Machining Technology - Scientific Research Report, Vol. 2},
    address = {Cracow},
    publisher = {Cracow University of Technology},
    date = {2012}
}