@misc{Kovalchuk_Vasyl_Nonlinear_2005,
 author={Kovalchuk, Vasyl},
 editor={Sławianowski, Jan Jerzy},
 copyright={Rights Reserved - Free Access},
 address={Warsaw},
 howpublished={online},
 year={2005},
 publisher={IFTR PAS},
 language={eng},
 title={Nonlinear models of collective and internal degrees of freedom in mechanics and field theory. Symmetry problems},
 type={Text},
 keywords={Mechanika analityczna [KABA], Mechanika ośrodków ciągłych [KABA], Mechanika nieliniowa, Nieliniowość, Teoria pola (fizyka)},
}