TY - JOUR AU - Roland Zielke TI - Concertina-Loke Movements of the Error Curve in the Alternation Theorem. JO - Manuscripta mathematica PY - 1977 SP - 229 EP - 234 VL - 22 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/MM2_1977__22_154494/ ID - MM2_1977__22_154494 ER -