Jointly with Erdös, he wrote The covering of n-dimensional space by spheres (1953) and Covering space with convex bodies (1961), writing many other articles on coverings and packings including Covering space with equal spheres with Coxeter .
Sama-sama sa Erdös, he wrote Ang takip ng n-dimensional space sa pamamagitan ng spheres (1953) at takip sa space sa matambok katawan (1961), pagsusulat ng maraming iba pang mga artikulo sa coverings at packings kasama ang takip sa space na may pantay na spheres sa Coxeter.