Published in Jornal de sciencias mathematicas, physicas e naturaes, in 1893, in volume 3, pages 47-48

Created: 2023-10-04, modified: 2023-10-04

Published in Jornal de Sciências, Mathemáticas, Physicas e Naturaes. Lisboa, in 1893, in volume 3, pages 115-121

Created: 2013-01-10, modified: 2013-01-10