LEBED, S.; ROGOSIN, S. Optimal design of unbounded 2D composite materials with circular inclusions of different radii. Annales Universitatis Paedagogicae Cracoviensis Studia Mathematica, [S. l.], v. 7, p. 91–99, 2008. Disponível em: https://studmath.uken.krakow.pl/article/view/13271. Acesso em: 31 oct. 2026.