no. 3
A priori bounds and renormalized Morse indices of solutions of an elliptic system
Annales de l'I.H.P. Analyse non linéaire, Tome 17 (2000) no. 3, pp. 277-306. 
@article{AIHPC_2000__17_3_277_0,
     author = {Angenent, Sigurd B. and van der Vorst, Robertus},
     title = {A priori bounds and renormalized {Morse} indices of solutions of an elliptic system},
     journal = {Annales de l'I.H.P. Analyse non lin\'eaire},
     pages = {277--306},
     publisher = {Gauthier-Villars},
     volume = {17},
     number = {3},
     year = {2000},
     mrnumber = {1771136},
     zbl = {0964.35037},
     language = {en},
     url = {http://archive.numdam.org/item/AIHPC_2000__17_3_277_0/}
}
TY  - JOUR
AU  - Angenent, Sigurd B.
AU  - van der Vorst, Robertus
TI  - A priori bounds and renormalized Morse indices of solutions of an elliptic system
JO  - Annales de l'I.H.P. Analyse non linéaire
PY  - 2000
SP  - 277
EP  - 306
VL  - 17
IS  - 3
PB  - Gauthier-Villars
UR  - http://archive.numdam.org/item/AIHPC_2000__17_3_277_0/
LA  - en
ID  - AIHPC_2000__17_3_277_0
ER  - 
%0 Journal Article
%A Angenent, Sigurd B.
%A van der Vorst, Robertus
%T A priori bounds and renormalized Morse indices of solutions of an elliptic system
%J Annales de l'I.H.P. Analyse non linéaire
%D 2000
%P 277-306
%V 17
%N 3
%I Gauthier-Villars
%U http://archive.numdam.org/item/AIHPC_2000__17_3_277_0/
%G en
%F AIHPC_2000__17_3_277_0
Angenent, Sigurd B.; van der Vorst, Robertus. A priori bounds and renormalized Morse indices of solutions of an elliptic system. Annales de l'I.H.P. Analyse non linéaire, Tome 17 (2000) no. 3, pp. 277-306. http://archive.numdam.org/item/AIHPC_2000__17_3_277_0/

[1] Angenent S.B., Van Der Vorst R., A superquadratic indefinite elliptic system and its Morse-Conley-Floer homology, Preprint, 1996.

[2] Bahri A., Lions P.L., Solutions of superlinear elliptic equations and their Morse indices, Comm. Pure and Applied Mathematics 45 (1992) 1205-1215. | MR | Zbl

[3] Courant R., Hilbert D., Methoden der Mathematischen Physik I, 3rd ed., Springer, Berlin, 1968. | MR | Zbl

[4] Duistermaat J.J., On the Morse index in the calculus of variations, Adv. in Math. 21 (1976) 173-195. | MR | Zbl

[5] Riesz F., Sz.-Nagy B., Functional Analysis, Frederick Ungar Publishing, New York, 1955. | MR | Zbl

[6] Robbin J., Salamon D.A., The spectral flow and the Maslov index, Bull. London Math. Soc. 27 (1995) 1-33. | MR | Zbl

[7] Stein E.M., Singular Integrals and Differentiability Properties of Functions, Princeton University Press, 1970. | MR | Zbl

[8] Yang X.-F., Nodal sets and Morse indices of solutions of superlinear elliptic equations, Preprint, 1997.