Once more on the dynamics of the rattleback (comment on “Strange attractors in rattleback dynamics” by A V Borisov and I S Mamaev [
Usp. Fiz. Nauk173
407 (2003);
Phys. Usp.46
393 (2003)] and “Nonlinear dynamics of the rattleback: a nonholonomic model” by A V Borisov, A O Kazakov, S P Kuznetsov [
Usp. Fiz. Nauk184
493 (2014);
Phys. Usp.57
453 (2014)])