1.
Corvellec J-N, Degiovanni M, Marzocchi M. Deformation properties for continuous functionals and critical point theory. TMNA [Internet]. 1993 Mar. 1 [cited 2024 Apr. 26];1(1):151-7. Available from: https://apcz.umk.pl/TMNA/article/view/TMNA.1993.012