Referencia documental:
SAA, Stadsarchief Amsterdam, NA 394/278- 278v, Nots: N. Jacobsz. Contract (Statement, Commercial credit, Power of attorney) of Francisco de Caceres, Antonio Martins Viegas, Leonard de Beer, Francisco Mendes de Medeiros, Michiel Coral, Willem Pietersz, Manuel Viegas, Dirck Pietersz