@ARTICLE {, title = {Dve poznámky ku kmitom pružinového kyvadla vo vyučovaní fyziky na strednej škole}, author = {Hrkota, Klement}, journal = {Obzory matematiky, fyziky a informatiky}, year = {2003}, volume = {32}, number = {4}, pages = {70--72}, issn = {1335-4981}, abstract = {Additional explanation and specification of oscillatory movement of the spring pendulum in the textbook for a high schools.}, }