TY  - RPRT
TI  - Multiperiodic orbits in a pendulum with a vertically oscillating pivot.
AU  - HJ Smith
AU  - JA Blackburn
PY  - 1994
DO  - 10.1103/physreve.50.539
UR  - https://pubmed.ncbi.nlm.nih.gov/9961999/
ID  - 9961999
ER  -