Piotr Sula. 2021. Diligent or just smart students? Small governmental parties’ approach to the European Semester in Poland, Politics in Central Europe, vol.17, no.3.

Piotr Sula, Małgorzata Madej, Kamil Błaszczyński. 2021. In the shadow of plagues: 2020 presidential elections in Poland, Przegląd Politologiczny, 2021, Vol. 2, 27-45, https://doi.org/10.14746/pp.2021.26.2.3. 

Piotr Sula, Małgorzata Madej. 2020. A dress rehearsal : European elections in Poland before the parliamentary race [in:] Radu Carp, Cristina Matiuța (eds.). European elections : the EU party democracy and the challenge of national populism. Leiden; Boston: Brill, pp. 155-168.

Piotr Sula. 2018. Partie małe w wybranych państwach Europy Środkowo – Wschodniej w latach 1989 – 2016, Kraków, Wydawnictwo Księgarnia Akademicka, pp. 218. [Small Parties in selected States of Central and Eastern Europe between 1989 and 2016].