Annali di Matematica Pura ed Applicata (1923 -) · 1965 · 29 citations · 10 references
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Alice T. Schafer, H. Guggenheimer · American Mathematical Monthly · 1964 · 203 citations
The foundations of Minkowskian geometry
Herbert Busemann · Commentarii Mathematici Helvetici · 1950 · 109 citations
Morgan William Crofton · Philosophical Transactions of the Royal Society of London · 1868 · 90 citations