On the blowup of multidimensional semilinear heat equations Stathis Filippas; Wenxiong Liu — 1993 Annales de l'I.H.P. Analyse non linéaire
On the structure of Hardy–Sobolev–Maz'ya inequalities Stathis Filippas; Achilles Tertikas; Jesper Tidblom — 2009 Journal of the European Mathematical Society