Decheng, Ding, Non-p-generic and Strongly Nonbranching Degree, Acta Mathematica Sinica, New Series Chinese Journal of Mathematics, 10(1), 1994, pp. 30-41
It has been proved by the author that every p-generic degree is nonbranching. In this paper we construct an r.e. degree which is strongly nonbranching and non-p-generic. It means that the class of nonbranching degrees does not coincide with the class of p-generic degrees.