Geodesic
An explicit formula for Witten's $2$-correlators
Zapiski Nauchnykh Seminarov POMI, Representation theory, dynamical systems, combinatorial methods. Part XXIX, Tome 468 (2018), pp. 53-57

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An explicit closed-form expression for the $2$-correlators of Witten's two-dimensional topological gravity is derived in arbitrary genus. 
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     author = {P. G. Zograf},
     title = {An explicit formula for {Witten's} $2$-correlators},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {53--57},
     publisher = {mathdoc},
     volume = {468},
     year = {2018},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_2018_468_a4/}
}
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P. G. Zograf. An explicit formula for Witten's $2$-correlators. Zapiski Nauchnykh Seminarov POMI, Representation theory, dynamical systems, combinatorial methods. Part XXIX, Tome 468 (2018), pp. 53-57. http://geodesic.mathdoc.fr/item/ZNSL_2018_468_a4/