Manetti, Marco. “Lie Description of Higher Obstructions to Deforming Submanifolds”. ANNALI SCUOLA NORMALE SUPERIORE - CLASSE DI SCIENZE 6, no. 4 (December 2, 2009): 631-659. Accessed June 17, 2025. http://20.103.181.36/index.php/annaliscienze/article/view/138.