R. F. José and M. R. Guerreiro,  "The roots of 4IR in architecture: A military drawing machine used for space perception in architecture", in Proc. of 37 eCAADe and XXIII SIGraDi Joint Conf., “Architecture in the Age of the 4Th Industrial Revolution”, Souza, J. P., Henriques, G. C., and Xavier, J. P., Ed., Porto, Blucher, 2019, vol. 1, pp. 397-406