We show that the ring of integers of K is a Euclidean domain if and only if it is a principal ideal domain. This was previously known under the assumption of the generalized Riemann Hypothesis for ...

D. N. Sparks, Algorithm AS 58: Euclidean Cluster Analysis, Journal of the Royal Statistical Society. Series C (Applied Statistics), Vol. 22, No. 1 (1973), pp. 126-130 ...