TY - JOUR AU - Moser, Philippe AU - Stephan, Frank TI - Depth, Highness and DNR degrees JO - Discrete mathematics & theoretical computer science PY - 2017-2018 VL - 19 IS - 4 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.23638/DMTCS-19-4-2/ DO - 10.23638/DMTCS-19-4-2 LA - en ID - DMTCS_2017_19_4_a1 ER -