@article{05208235,
title = {Brackets and curvature. (Corchete y curvatura.)},
journal = {Revista Colombiana de Matem\'aticas},
volume = {39},
year = {2005},
pages = {113-131},
zbl = {1144.53026},
language = {en},
url = {http://dml.mathdoc.fr/item/05208235}
}
Di Scala, Antonio J. Brackets and curvature. (Corchete y curvatura.). Revista Colombiana de Matemáticas, Tome 39 (2005) pp. 113-131. http://gdmltest.u-ga.fr/item/05208235/