TY - JOUR AU - H.B., Jr Lawson AU - M.-L. Michelsohn TI - Approximation by positive mean curvature immersions: frizzing. JO - Inventiones mathematicae PY - 1984 SP - 421 EP - 426 VL - 77 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/IM_1984__77_143153/ ID - IM_1984__77_143153 ER -