L1 - http://www.journals.pan.pl/Content/105809/PDF/10.1515bpasts-2017-0102.pdf L2 - http://www.journals.pan.pl/Content/105809 PY - 2017 IS - No 6 (Special Section on Civil Engineering – Ongoing Technical Research. Part II) EP - 959 DO - 10.1515/bpasts-2017-0102 A1 - Michalczyk, K. VL - 65 DA - 2017 T1 - Natural transverse vibrations of helical springs in sections covered with elastic coatings SP - 949 UR - http://www.journals.pan.pl/dlibra/publication/edition/105809 T2 - Bulletin of the Polish Academy of Sciences Technical Sciences