DOŠLÝ, Ondřej. Oscillation and spectral properties of self-adjoint even order differential operators with middle terms. In Electron. J. Qualit. Theor. Diff. Equ., Proc. 7th Coll. QTDE,. Szeged: Univ. Szeged, 2004, p. 1-21. ISSN 1417-3875.
DOŠLÝ, Ondřej and Simona FIŠNAROVÁ. Oscillation and nonoscillation of solutions to even order self-adjoint differential equations. Eletron. J. Differ. Equ. 2003, vol. 2003, No 4, p. 1-21. ISSN 1072-6691.
DOŠLÝ, Ondřej and Roman HILSCHER. Spectral properties of fourth order differential operators. Mathematica Bohemica : časopis pro pěstování matematiky. Praha: Matematický ústav AV ČR, 1997, vol. 122, No 3, p. 153-168. ISSN 0862-7959.