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  1. By: Guimarães, Antonio Roberto Pereira
    Type: Article
    In: Jornal de sciencias mathematicas, physicas e naturaes
    Volume: 9
    Date: 1884
    Page Range: 85--87
    Publication Info: Lisboa, Academia Real das Sciencias de Lisboa, 1866-1927
  2. By: Guimarães, Antonio Roberto Pereira
    Type: Article
    In: Jornal de sciencias mathematicas, physicas e naturaes
    Volume: 8
    Date: 1882
    Page Range: 222--224
    Publication Info: Lisboa, Academia Real das Sciencias de Lisboa, 1866-1927
  3. By: Guimarães, Antonio Roberto Pereira
    Type: Article
    In: Jornal de sciencias mathematicas, physicas e naturaes
    Volume: 10
    Date: 1884
    Page Range: 1--10
    Publication Info: Lisboa, Academia Real das Sciencias de Lisboa, 1866-1927