Queries may be addressed to

Diogo Gomes
ICTI Applied Mathematics Program
Departamento de Matemática
Instituto Superior Técnico
1049-001 LISBOA
Portugal
dgomes@math.ist.utl.pt

or to

Irene Fonseca
ICTI Applied Mathematics Program
Department of Mathematical Sciences
Carnegie Mellon University
Pittsburgh, PA 15213-3890
USA
fonseca@andrew.cmu.edu