2. Équations hyperboliques à coefficients constants
J. Vaillant (Université Pierre et Marie Curie, Paris)
Coimbra, 1983
3. A sympletic approach to field theory of elliptic type
P. Urbanki (Department of Mathematical Methods in Physics, University of Warsaw)
Coimbra, 1984
4. Unitary relations
StanisLaw Zarkzewski (Department of Mathematical Methods in Physics, University of Warsaw)
Coimbra, 1985
5. Oscilatory behaviour of solutions of y'' + P(x)y = f(x),
A. A. S. Zaghrout, A. A. Ragab
On approximations to Floquet systems,
A. A. S. Zaghrout, A. A. Ragab
Asymptotic representations for some multiple hypergeometric functions,
J. Carvalho e Silva
Nonresonance conditions at the two first eigenvalues for semi-linear equations,
Luís Amaral
Coimbra, 1986