On K-Stage Euclidean algorithms for Galois extensions of Q. David A. Clark — 1996 Manuscripta mathematica
A quadratic field which is euclidean but not norm-euclidean. David A. Clark — 1994 Manuscripta mathematica
The Euclidean algorithm for Galois extensions of Q. David A. Clark; M. Ram Murty — 1995 Journal für die reine und angewandte Mathematik