Młocek Wojciech; Ptak Marek; Toeplitz Otto: On the reflexivity of subspaces of Toeplitz operators in simply connected regions. In: Acta scientiarum mathematicarum, (80) 1-2. pp. 275-287. (2014)
Ptak Marek: Two variables Toeplitz type operators. In: Acta scientiarum mathematicarum, (71) 1-2. pp. 353-362. (2005)
Azoff Edward A.; Ptak Marek: Jointly quasinormal families are reflexive. In: Acta scientiarum mathematicarum, (61) 1-4. pp. 545-547. (1995)