P. Sieńko, The Impact Of Political Decisions On The Possibility Of Implementing The Polish National Security Strategy In The Field of State’s Responsibilities to Critical Infrastructure Protection – monograph prepared for printing in 2022.
P. Sieńko, Media As The States` Strategic Assets – monograph prepared for printing in 2023.
P. Sieńko, Legal and economic phenomenon of “debt farming” and the so-called bankruptcy hyenas – case study, prepared for printing in 2020 ( prepared for printing in 2023)
P. Sieńko, Methods of securing and controlling critical infrastructure assets allocated in Information And Communications Technology (ICT) sector companies in leading European Union countries, Securitologia, ISSN: 1898-4509, nr 2/2015, str. 107-123
P. Sieńko, Legal aspects of protection and control of strategic state resources accumulated in commercial companies significant for national security and public order, Securitologia, ISSN: 1898-4509, nr 2/2014, str. 37-53
P. Sieńko, Russian policy of pretexts vs. Article 5 of The North Atlantic Treaty – threats and defence possibilities, Securitologia, ISSN: 1898-4509, nr 1/2014, str. 47-65
P. Sieńko, E. Pasternak, „Media communication as part of a country’s information policy in times of democracy”, w: „Media And Democratization”, I. Biernacka-Ligięza (red), Wyd. A. Marszałek, Toruń 2013, str. 65 – 98