1. Salah A. Aly, Andreas Klappenecker, and Kiran Sarvepalli Pradeep, Subsystem codes, IEEE International Symposium on Information Theory, Toronto, Canada, 2008 (ISIT 08), IEEE, New York, 2008, pp. 369–373.[doi/arXiv]
  2. A. Klappenecker and M. Rötteler, Remarks on Clifford codes, Quantum Information and Computation 4 (2004), no. 2, 152-160.
  3. A. Klappenecker and P. K. Sarvepalli, Clifford code constructions of operator quantum error-correcting codes, IEEE Transactions on Information Theory 54 (2008), no. 12, 5760-5765.[arXiv]
  4. Andreas Klappenecker and Martin Rötteler, Beyond stabilizer codes I: Nice error bases, IEEE Trans. Inform. Theory 48 (2002), no. 8, 2392–2395.[MR/doi]
  5. Andreas Klappenecker and Martin Rötteler, Unitary error bases: Constructions, equivalence, and applications, Applied Algebra, Algebraic Algorithms and Error-correcting Codes (Toulouse, 2003), Lecture Notes in Comput. Sci., vol. 2643, Springer, Berlin, 2003, pp. 139–149.[MR]
  6. Andreas Klappenecker and Martin Rötteler, On the structure of nonstabilizer Clifford codes, Quantum Inf. Comput. 4 (2004), no. 2, 152–160.[MR]