On the Morse-Novikov number for 2-knots, 2015
with Hisaaki Endo arXiv

On the fixed points of a Hamiltonian diffeomorphism in presence of fundamental group, 2014
with Kaoru Ono, arXiv

C^0-topology in Morse theory, 2003

Incidence coefficients in the Novikov complex for Morse forms: rationality and exponential growth properties, 1996

Surgery on the Novikov complex, 1993
Université de Nantes, Rapport de Recherche,  93/01-2, 6993. Ch 1-4 (pdf),   Ch 5-9 (pdf)

On the Novikov complex for Rational Morse Forms, 1991
Institut for Matematik og Datalogi, October 1991, Odense Universitet Preprints 1991, No 12 TSSN No. 0903-3920,pdf