Instytut Matematyki - lista publikacji
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1-2 z 2.
1969
2.
Note on the existence of periodic solutions of a second order differential equation, ANN. POLON. MATH. 21 (1969) 305--307
1.
An axiomatic approach to the problem of the closedness of the set of trajectories in the control theory, BULL. ACAD. POLON. SCI. SÉR. SCI. MATH. ASTRONOM. PHYS. 17 (1969) 733--738