ŠIMON HILSCHER, Roman and Vera ZEIDAN. Weak maximum principle and accessory problem for control problems on time scales. Nonlinear Analysis. 2009, vol. 70, No 9, p. 3209-3226. ISSN 0362-546X.
HILSCHER, Roman and Vera Michel ZEIDAN. Riccati equations for abnormal time scale quadratic functionals. Journal of Differential Equations. San Diego (USA): Elsevier Science, 2008, vol. 244, No 6, p. 1410-1447. ISSN 0022-0396.
BOHNER, Martin and Roman HILSCHER. An eigenvalue problem for linear Hamiltonian dynamic systems. Fasciculi Mathermatici. Poznaň, Polsko: Politechnika Poznaňska, Institut Mat., 2005, vol. 35, No 1, p. 35-49. ISSN 0044-4413.
ŘEHULKA, Evžen and Oliva ŘEHULKOVÁ. Kvalita života v rozměru normality a patologie (Quality of life in relation to normality and pathology). In Konference Sociální procesy a osobnost 2005. Sborník abstrakt. Brno: Zprávy PSÚ AV ČR, 2005, p. 13-14. ISSN 1211-8818.
HILSCHER, Roman and Vera ZEIDAN. Second order sufficiency criteria for a discrete optimal control problem. Journal of Difference Equations and Applications. Taylor and Francis, 2002, vol. 8, No 6, p. 573-602. ISSN 1023-6198.