BodnarchukY. V. and Prokof’evP. H. (2009) “Locally nilpotent derivations and Nagata-type utomorphisms of a polynomial algebra”, Ukrains’kyi Matematychnyi Zhurnal, 61(8), pp. 1011-1024. Available at: https://umj.imath.kiev.ua/index.php/umj/article/view/3077 (Accessed: 22November2024).