Materials and technologies used in the production of highly loaded gear wheels : [abstract] / Jan Zwolak, Stanisław J. SKRZYPEK, Dominik Kozik // W: PTME 2019 : Progressive Technologies in Mechanical Engineering : VIII international scientific and technical conference : 4–8 February 2019, Ivano-Frankivsk – Yaremche : conference proceedings = Progresivnì tehnologìï u mašinobuduvannì : VIII mìžnarodnoï naukovo-tehnìčnoï konferencìï : 4–8 lûtogo 2019 r., Ìvano-Frankìvsk – Âremče / Ivano-Frankivsk National Technical University of Oil and Gas. Institute of Engineering Mechanics, Lviv Polytechnic National University. Institute of Engineering Mechanics and Transport. — Ivano-Frankivsk – Yaremche: [s. n.], [2019]. — ISBN: 978-617-7496-46-4. — S. 47