Hypersurfaces in non-flat Lorentz space form satisfying L_kX=AX+B ; XVII ESCOLA DE GEOMETRÍA DIFERENCIAL, Manaus, Brasil, julio 2012.
Hypersurfaces in pseudo-Euclidean spaces satisfiying L_kX=AX+B; VII INTERNATIONAL MEETING ON LORENTZIAN GEOMETRY, Sao Paulo, Brasil, julio 2013.
L_k-2-type hypersurfaces in hyperbolic space; XVIII ESCOLA DE GEOMETRIA DIFERENCIAL, Brasilia, Brasil, julio 2014.
An extension of takahashi theorem for the Lorentz-Minkowski space with operators L_k; XVIII CONGRESO COLOMBIANO DE MATEMATICAS CCM-2011, CO68001, Colombia, julio 2011.
A result of classification in the space S^n and H^n_t; VIII SIMPOSIO NORORIENTAL DE MATEMÁTICAS, CO68001, Colombia, diciembre 2013.
Hypersurfaces in the Lorentz-Minkowski space satisfying L_kX=AX+B; INTERNATIONAL MEETING ON DIFFERENTIAL GEOMETRY, CORDOBA 2010, Cordoba, España, noviembre 2010.
Hypersurfaces in the Lorentz-Minkowski space satisfying L_kX=AX+B; CONFERENCE IN GEOMETRY AND GLOBAL ANALYSIS CELEBRATING PETER GILKEY'S 65 BIRTHDAY, Santiago de Compostela, España, diciembre 2010.
Hypersurfaces in the Lorentz-Minkowski space satisfying L_kX=AX+B; SPANISH-JAPANESE WORKSHOP ON DIFFERENTIAL GEOMETRY, Granada, España, febrero 2011.
Hypersurfaces in non-flat Lorentz space form satisfying L_kX=AX+B ; VI INTERNATIONAL MEETING ON LORENTZIAN GEOMETRY, Granada, España, septiembre 2011.
Hypersurfaces in pseudo-Euclidean spaces satisfiying L_kX=AX+B; INTERNATIONAL CONGRESS OF MATHEMATICIANS, Seoul, Corea, República de Corea, agosto 2014.