Nematic liquid crystal around a spherical particle: Investigation of the defect structure and its stability using adaptive mesh refinementJun-ichi Fukuda, Makoto Yoneya and Hiroshi YokoyamaEur. Phys. J. E, 13 1 (2004) 87-98DOI: https://doi.org/10.1140/epje/e2004-00043-2