- Pierre Charbit, Emmanuel Jeandel, Pascal Koiran, Sylvain Perifel, Stéphan Thomassé, “Finding a vector orthogonal to roughly half a collection of vectors”, Journal of Complexity, 24, № 1, 2008, 39
- Pascal Koiran, 4664, Machines, Computations, and Universality, 2007, 80
- Peter Hertling, “Topological Complexity of Zero Finding with Algebraic Operations”, Journal of Complexity, 18, № 4, 2002, 912