Jordan, Schoenflies and Analysis Situs (outline of issues before 1960)
Antiquitates Mathematicae, Tome 4 (2010).
From Leibniz extends the idea to develop research relating to such properties of various forms, which do not depend on the size and the distance between their elements. He called this new, not yet existing field of mathematics, Analysis Situs [Positions analysis ] and thought about its construction. On this, however, mean stop there.
Source: 
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     author = {Roman Duda},
     title = {Jordan, {Schoenflies} and {Analysis} {Situs} (outline of issues before 1960)},
     journal = {Antiquitates Mathematicae},
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     year = {2010},
     language = {en},
     url = {https://geodesic-test.mathdoc.fr/item/ANME_2010__4_292915/}
}
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Roman Duda. Jordan, Schoenflies and Analysis Situs (outline of issues before 1960). Antiquitates Mathematicae, Tome 4 (2010). https://geodesic-test.mathdoc.fr/item/ANME_2010__4_292915/