The multi-vehicle covering tour problem: building routes for urban patrolling. - Washington A. Oliveira; Margarida P. Mello; Antônio Carlos Moretti; Ednei F. Reis (CoRR, 2013)

Nonidentical circle packing problem: multiple disks installed in a rotating circular container. - Washington A. Oliveira; Luiz Leduíno de Salles Neto; Antônio Carlos Moretti; Ednei F. Reis (CoRR, 2014)