1. Mechanik;Kirchhoff,1883
2. On the well-posedness of the Kirchhoff string;Arosio;Trans. Amer. Math. Soc.,1996
3. Sur une classe d’équations fonctionnelles aux dérivées partielles;Bernstein;Bull. Acad. Sci. URSS. Sér. (Izvestia Akad. Nauk SSSR),1940
4. On some questions in boundary value problems of mathematical physics;Lions,1978
5. Positive solutions of nonlinear elliptic equations involving critical Sobolev exponents;Brézis;Comm. Pure Appl. Math.,1983