Didier Alquié. 2-round Substitution-Permutation and 3-round Feistel Networks have bad Algebraic Degree. IACR Cryptology ePrint Archive, 2010:71, 2010. [doi]
@article{Alquie10, title = {2-round Substitution-Permutation and 3-round Feistel Networks have bad Algebraic Degree}, author = {Didier Alquié}, year = {2010}, url = {http://eprint.iacr.org/2010/071}, researchr = {https://researchr.org/publication/Alquie10}, cites = {0}, citedby = {0}, journal = {IACR Cryptology ePrint Archive}, volume = {2010}, pages = {71}, }