- Dariusz Bugajewski, Jacek Gulgowski, Piotr Kasprzak, On continuity and compactness of some nonlinear operators in the spaces of functions of bounded variation, Ann. Mat. Pura Appl., in press.
- Piotr Kasprzak, Piotr Maćkowiak, Local boundedness of nonautonomous superposition operators in
![$$ BV[0,1] $$](https://octd.wmi.amu.edu.pl/latex/242420BV5b02c15d202424.png)
, Bull. Aust. Math. Soc., in press, DOI: 10.1017/S0004972715000593 - Dariusz Bugajewski, Piotr Kasprzak, Leggett-Williams type theorems with applications to nonlinear differential and integral equations, Nonlinear Anal. 114 (2015), 116-132.
- Daria Bugajewska, Piotr Kasprzak, On bounded lower
-variation, J. Math. Anal. Appl. 432 (2015) 561-593. - Dariusz Bugajewski, Xiao-Xiong Gan, Piotr Kasprzak, Mappings of higher order and nonlinear equations in some spaces of almost periodic functions, Nonlinear Anal. 75 (2012), no. 13, 5294-5310.
- Dariusz Bugajewski, Piotr Kasprzak, On mappings of higher order and their applications to nonlinear equations, Commun. Pure Appl. Anal 11 (2012), no. 2, 627-647.
- Daria Bugajewska, Piotr Kasprzak, On the Existence Uniqueness and Topological Structure of Solution Sets to a Certain Fractional Differential Equation, Comput. Math. Appl., Speccial Issue: "Advance in Fractional Differential Equations", 59 (2010), 1108-1116.
- Dariusz Bugajewski, Piotr Kasprzak, Fixed point theorems for weakly
-contractive and strongly -expansive mappings, J. Math. Anal. Appl. 359, 2009, 126-134.