Historical notes on Steiner systems
The author points out that Steiner systems were treated before Steiner (1853) not only by W. S. B. Woolehouse (1844) and T. P. Kirkman (1847) but also by Julius Plücker (1835). He then goes on to discuss in detail Plücker's S(2,3,9).
scientific article; zbMATH DE number 3877131
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