The Bonnet-Meyers theorem is true for Riemann Hilbert Manifolds.
Andersson, Lars
Mathematica Scandinavica, Tome 58 (1986), p. 236-238 / Harvested from Göttinger Digitalisierungszentrum
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Publié le : 1986-01-01
EUDML-ID : urn:eudml:doc:166980 
@article{GDZPPN002358913,
     title = {The Bonnet-Meyers theorem is true for Riemann Hilbert Manifolds.},
     journal = {Mathematica Scandinavica},
     volume = {58},
     year = {1986},
     pages = {236-238},
     zbl = {0588.58003},
     url = {http://dml.mathdoc.fr/item/GDZPPN002358913}
}

Andersson, Lars. The Bonnet-Meyers theorem is true for Riemann Hilbert Manifolds.. Mathematica Scandinavica, Tome 58 (1986) pp. 236-238. http://gdmltest.u-ga.fr/item/GDZPPN002358913/