TY - JOUR AU - S. P. Khekalo TI - Iso-Huygens deformations of the Cayley operator by the general Lagnese--Stellmacher potential JO - Izvestiya. Mathematics PY - 2003 SP - 815 EP - 836 VL - 67 IS - 4 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/IM2_2003_67_4_a5/ LA - en ID - IM2_2003_67_4_a5 ER -