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Symplectic difference systems: variable stepsize discretization and discrete quadratic functionals J - Článek v odborném periodikuHILSCHER, Roman a Vera ZEIDAN. Symplectic difference systems: variable stepsize discretization and discrete quadratic functionals. Linear Algebra and its Applications. USA: Elsevier Science, 2003, roč. 367, č. 1, s. 67-104. ISSN 0024-3795.Podrobněji: https://is.muni.cz/publication/488397/cs