EKIEL-JEŻEWSKA, M.L.; WAJNRYB, E. Three-particle motion under gravity in Stokes flow: an equilibrium for spheres in contrast to "an end-of-world" for point particles. Archives of Mechanics, Warsaw, Poland, v. 58, n. 4-5, p. 489–494, 2006. Disponível em: https://am.ippt.pan.pl/index.php/am/article/view/v58p489. Acesso em: 13 dec. 2025.