These latter authors make use of the quasi-classical approximation being very different from the one of Cheng and Wu .
Agreement was obtained with predictions of Cheng Wu which later were verified by Milstein and Strakhovenko .
These latter authors make use of the quasi-classical approximation being very different from the one of Cheng Wu and Wu .
Agreement was obtained with predictions of Cheng Wu which later were verified by Milstein and Strakhovenko .