-
Bächtold, Michael (2016). Partial extensions of jets and the polar distribution on Grassmannians of non-maximal integral elements. Journal of Differential Equations, 3056-3085.
-
Bächtold, Michael & Moreno, Giovanni (2014). Remarks on non-maximal integral elements of the Cartan plane in jet spaces. Journal of Geometry and Physics, 185-195.
-
Bächtold, Michael (2007). Ricci flat metrics with bidimensional null orbits and non-integrable orthogonal distribution. Differential Geometry and its Applications, 167-176.