@article{PalusKurthsSchwarzetal.2001,
  author    = {Milan Palus and J{\"u}rgen Kurths and Udo Schwarz and Dagmar Novotn{\´a} and Ivanka Charv{\´a}tov{\´a}},
  title     = {Is the solar activity cycle synchronized with the solar inertial motion?},
  url       = {http://ejournals.wspc.com.sg/ijbc/10/1011/S0218127400001766.html},
  year      = {2001},
}