1. Ahrens, A., & Zaščerinska, J. (2014a). A Framework for Selecting Sample Size in Educational Research on e-Business Application. Mohammad S. Obaidat, Andreas Holzinger, Marten van Sinderen and Peter Dolog (Eds), In Proceedings of ICE-B 2014 11th International Conference on E-Business Vienna, Austria, 28–30 August, 2014, pp. 31–38, indexed by Thomson Reuters Conference Proceedings Citations Index. Publisher: SciTePress—Science and Technology Publications. Printed in Portugal. ISBN: 978–989–758–043–7.
2. Ahrens, A., & Zaščerinska, J. (2014b). Factors that Influence Sample Size in Educational Research. 2014 ATEE Spring University proceedings Changing Education in a Changing Society, pp. 19–32. Published by Klaipeda University, Lithuania. ISSN 1822–2196.
3. Ahrens, A., & Zaščerinska, J. (2015a). Principles of Sampling in Educational Research in Higher Education. Proceedings of the International Scientifical Conference Society, Integration, Education, Volume 1 Higher Education Pedagogy, May, 22nd-23rd, 2015, pp. 25–35.—Rēzekne: Rēzeknes Augstskolas Izdevniecība, 2015. p 468. ISSN 2256–0629. ISBN 978–9984–44–166–5. https://doi.org/10.17770/sie2015vol1.310 ; http://journals.ru.lv/index.php/SIE/issue/view/23.
4. Ahrens, A., & Zaščerinska, J. (2015b). Methodology of Sampling in Educational research in Higher Education. In Abstracts of 2015 ATEE Spring Conference—Teacher of the 21st Century: Quality Education for Quality Teaching, p. 31. University of Latvia, Riga, Latvia. 8–10 May 2015. http://www.eduinf.lu.lv/pn/files/Abstracts_ATEE_2015.
5. Ahrens, A., Bassus, O., & Zaščerinska, J. (2013a). Bi-professional Curriculum in Higher Education: Context Analysis. Proceedings of 6th ICEBE International Conference on Engineeirng and Business Education Innovation, Entrepreneurship and Sustainability, 101–107.