2 literature references for Ommastrephes argentinus Castellanos, 1960:

Author: Castellanos, Z. J. A. de
Year: 1960
Title: Una nueva especie de calamar Argentino, Ommastrephes argentinus sp. nov. (Mollusca, Cephalopoda)
Source: Neotropica, 6 (20)
Author: Roper, Clyde F. E., C. C. Lu and Katharina Mangold
Year: 1969
Title: A new species of Illex from the western Atlantic and distributional aspects of other Illex species (Cephalopoda: Oegopsida)
Source: Proceedings of the Biological Society of Washington, 82