All-solid-state $Ca^{2+}$ – selective electrodes with TCNQ and KTCNQ crystals as internal layer / Nikola LENAR, Robert PIECH, Beata PACZOSA-BATOR // W: EYEC monograph : 8th European Young Engineers Conference : 8–10 April 2019, Warsaw. — Warsaw : Faculty of Chemical and Process Engineering. Warsaw University of Technology, cop. 2019. — ISBN: 978-83-936575-7-5. — S. 285

$CeO_{2}$ – contacted ion-selective electrodes as electrochemical sensors for nitrate ions determination in leafy vegetables / Agata Wieczorek, Nikola LENAR, Robert PIECH, Beata PACZOSA-BATOR // W: 8\textsuperscript{th} international workshop on Surface engineering & 4\textsuperscript{th} international workshop on Applied and sustainable engineering [Dokument elektroniczny] : from 02.06.2019 to 08.06.2019, Koszalin. — Wersja do Windows. — Dane tekstowe. — [Koszalin : Koszalin University of Technology], [2019]. — Ekran [10]. — Tryb dostępu: http://workshop.tu.koszalin.pl/abstracts.html [2019-09-11]

pH-selective potentiometric sensor based on ceramic nanoparticles / Nikola LENAR, Robert PIECH, Beata PACZOSA-BATOR // W: 8\textsuperscript{th} international workshop on Surface engineering & 4\textsuperscript{th} international workshop on Applied and sustainable engineering [Dokument elektroniczny] : from 02.06.2019 to 08.06.2019, Koszalin. — Wersja do Windows. — Dane tekstowe. — [Koszalin : Koszalin University of Technology], [2019]. — Ekran [9]. — Tryb dostępu: http://workshop.tu.koszalin.pl/abstracts.html [2019-09-11]

Poly(3-octylthiophene-2,5-diyl) - nanosized ruthenium dioxide composite material as solid-contact layer in polymer membrane-based $K^{+}$-selective electrodes / Nikola LENAR, Beata PACZOSA-BATOR, Robert PIECH, Agnieszka KRÓLICKA // Electrochimica Acta : Journal of the International Society of Electrochemistry ; ISSN 0013-4686. — 2019 vol. 322 art. no. 134718, s. 1–9. — Bibliogr. s. 8–9, Abstr.. — Publikacja dostępna online od: 2019-08-19. — tekst: https://www-1sciencedirect-1com-1000027km00fb.wbg2.bg.agh.edu.pl/science/article/pii/S0013468619315890/pdfft?md5=015335279f78f326985b7b1a4a812045&pid=1-s2.0-S0013468619315890-main.pdf

Ruthenium dioxide as high-capacitance solid-contact layer in $K^{+}-selective$ electrodes based on polymer membrane / Nikola LENAR, Beata PACZOSA-BATOR, Robert PIECH // Journal of the Electrochemical Society ; ISSN 0013-4651. — 2019 vol. 166 iss. 15, s. B1470–B1476. — Bibliogr. s. B1476. — Publikacja dostępna online od: 2019-10-30. — tekst: http://jes.ecsdl.org/content/166/15/B1470.full.pdf+html

Ruthenium dioxide nanoparticles as a high-capacity transducer in solid-contact polymer membrane-based pH-selective electrodes / Nikola LENAR, Beata PACZOSA-BATOR, Robert PIECH // Microchimica Acta ; ISSN 0026-3672. — 2019 vol. 186 iss. 12 art. no. 777, s. 1–11. — Bibliogr. s. 10–11, Abstr.. — Publikacja dostępna online od: 2019-11-15. — tekst: https://link.springer.com/content/pdf/10.1007%2Fs00604-019-3830-x.pdf

The influence of sodium-selective membrane composition on analytical parameters of TCNQ-based potentiometric sensors / Nikola LENAR, Magdalena PIĘK, Robert PIECH, Beata PACZOSA-BATOR // W: EYEC monograph : 8th European Young Engineers Conference : 8–10 April 2019, Warsaw. — Warsaw : Faculty of Chemical and Process Engineering. Warsaw University of Technology, cop. 2019. — ISBN: 978-83-936575-7-5. — S. 286

Wpływ kryształów organicznych TCNQ i KTCNQ na własności elektrod jonoselektywnych czułych na jony wapnia — [Influence of TCNQ and KTCNQ organic crystals on the properties of ion selective electrodes sensitive to calcium ions] / Nikola LENAR, Robert PIECH, Beata PACZOSA-BATOR // W: Elektroanaliza – sensory i metody pomiarowe : praca zbiorowa / pod red. Bogusława Basia, Małgorzaty Jakubowskiej, Władysława W. Kubiaka. — Kraków : Wydawnictwo Naukowe AKAPIT, 2019. — ISBN: 978-83-65955-36-4. — S. 115–127. — Bibliogr. s. 127