ENGLISH:
- In Memoriam: Prof. Rainer Arnold (1943–2025), „Часопис Київського Університету Права”, 2025, nr 2, s. 189-190.
- Monarchy in the Republic – Sultanate of Yogyakarta in the Republic of Indonesia [co-author Dr. Indria Wahyuni (Universitas Airlangga, Indonesia), „Przegląd Prawa Konstytucyjnego” (Constitutional Law Review), 2023, no. 6.
- On the violation of the Rule of Law as the basis for repealing the whole act in the latest case-law of the Polish Constitutional Tribunal – or how the Parliamentary Obstruction contributed to the Constitutional Tribunal repealing the whole Act against the will of its President and what resulted from it (Case no. Kp 1/18). Madrid 2020 (accepted for printing)
- The concept of mixed monarchy and the monarchical principle in the study of modern state systems „History of European Ideas”, 2023
- Lobbying [in:] Cremades, J., Hermida, C. (eds) Encyclopedia of Contemporary Constitutionalism. Springer, Cham 2021. https://doi.org/10.1007/978-3-319-31739-7_82-1
- Constitutional (Mixed) Monarchy [in:] Cremades, J., Hermida, C. (eds) Encyclopedia of Contemporary Constitutionalism. Springer, Cham 2021. https://doi.org/10.1007/978-3-319-31739-7_83-1
- Phantom regulation or 13 years of the Polish law on lobbing and what did (not) result from it. „Istituzioni del Federalismo. Rivista di studi giuridici e politici”, Emilia-Romagna-Włochy 2018, no. 3-4, p. 765-788.
- The draft Constitution of the Polish State of 1917 (Projekt Konstytucji Państwa Polskiego z 1917 r.). On the idea of resurrecting the Polish state in 1918 as a mixed (constitutional) monarchy and the main provisions of the monarchical constitution for Poland, „Przegląd Prawa Konstytucyjnego” („Constitutional Law Review”), 2018, no. 6, p. 25-40.
- Proposals for amending the Constitution of the Republic of Poland of 1997 in responses to the 2017 Constitutional Survey, „Przegląd Konstytucyjny” („Constitutional Review”), 2018, no. 4, p. 26-42.
- Acceptance of foreign orders by the President of the Republic of Poland with regard to Polish legal regulations and practice of bestowal and acceptance of decorations, „Przegląd Prawa Konstytucyjnego” („Constitutional Law Review”), 2017, nr 6
- Return of the Kings. The Institutionalization of the Royal Families in the Republics of Romania and Montenegro in the 21st century, „Gdańskie Studia Prawnicze” („Gdansk Legal Studies”), 2017, Vol. XXXVIII, p. 245-26
- A Wolf in Sheep’s Clothing. On strategic litigation and amicus curiae as the forms of lobbying activity [in:] A. Machnikowska (ed.), The Legitimation of Judicial Power, Gdańsk 2017, p. 139-168, ISBN: 978-83-7865-520-6
- Lobbying Act and the Law-Making Process, „The Sejm Review” (Przegląd Sejmowy) 4th Special Edition, Warszawa 2010, p. 151-182
- Legal Regulation of Lobbying in New Members States of the European Union, Arbeitspapiere und Materialien – Forschungsstelle Osteuropa an der Universitat Bremen. Participation of Civil Society in New Modes of Governance. The Case of the New Member States. Part 2: Questions of Accountability. 74, Bremen 2006.
- The Szeliga device in Libro del conoscimiento, „Emblemata. Revista Aragonesa de Emblematica”, 2001, no. 7. Institución Fernando el Católico, Zaragoza, Spain.
ITALIAN:
- Il Presidente della Repubblica di Polonia nel ruolo di custode della sicurezza: teoria, legislazione e prassi politica [w:] Sicurezza e Democrazia: Atti del X Colloquio italo-polacco sulle trasformazioni istituzionali Bari-Foggia, 19-20 ottobre 2023, pod red. P. Gambale, N. Lupo, A. Sandulli et al., Studi del Dipartimento di Giurisprudenza Luiss Guido Carli, 2025, no. 3, Torino 2025.
- Gli istituti di democrazia diretta e i loro effetti sulle politiche pubbliche in Polonia [w:] La democrazia diretta in Italia, Polonia e Unione europea Demokracja bezpośredniawe Włoszech, w Polsceoraz w Unii EuropejskiejAtti del VII Colloquio italo-polacco sulle trasformazioni istituzionali. Palermo, Palazzo Steri 7-8 giugno 2018. A cura di Gian Candido De Martin, Andrzej Szmyt, Piero Gambale e Maciej Serowaniec, LUISS University Press, Roma 2020, s. 451-474, ISBN 978-88-6105-369-4.
- L’articolazione degli interessi nell’ambito del processo politico decisionale – i gruppi di interesse (le lobbies), l’audizione pubblica, le petizioni, i think tank (i gruppi di esperti o di riflessione) e le fondazioni politiche. „Toruńskie Studia Polsko-Włoskie. Studi polacco-italiani di Toruń”, 2016, vol. XII, p. 247-271.
SPANISH:
- Futuro – fuerte – fin – Felipe, o varias reflexiones sobre el futuro de la monarquía parlamentaria española 40 años después de su in(re)stauración y un año después de la primera sucesión al trono, [in:] J. Stelina, Pedro José Carrasco Parrilla (eds.) Aspectos Fundamentales del Derecho Público y Derecho Laboral en Polonia, España y América Latina, Valencia 2017, p. 255-275, ISBN: 978-84-9143-727-7.









