The journal article by Miklós Sebők, Rebeka Kiss and Ádám Kovács has been published in Parliamentary Affairs on June 12, 2023, entitled The Concept and Measurement of Legislative Backsliding.
The article is available here: https://doi.org/10.1093/pa/gsad014
The PDF version can be found here: https://academic.oup.com/pa/advance-article-pdf/doi/10.1093/pa/gsad014/50576067/gsad014.pdf