# [http://rmf.smf.mx/pdf/rmf/31/4/31_4_0743.pdf Orthonormalization on the plane: a geometric approach], en colaboración con E. Gagliano. {{pdf|http://cyt-ar.com.ar/cyt-ar/images/f/f1/Orthonormalization_on_the_plane.pdf|Descarga local del trabajo original corregido}}.
# Hamiltonianos Efectivos en Resonancia Paramagnética Electrónica: aplicación a los alumbres de Cs y Ti.
# [http://www.academia.edu/attachments/12820002/download_file An effective Hamiltonian and time-independent perturbation theory].
# Spin effectif.
# Diagonalisation of the g-matrix of low symmetry transition ions.
# Definition of an effective Hamiltonian and some soluble cases.
# [http://www.academia.edu/attachments/7689768/download_file The Use of Irreducible Operators for Determining the Complete Set of Linearly Independent Crystal Field Parameters].
# The main equations which define an effective Hamiltonian.