@article{01907873, title = {On the rigidity of horizontal slices.}, journal = {Portugaliae Mathematica. Nova S\'erie}, volume = {59}, year = {2002}, pages = {409-433}, zbl = {1032.32010}, language = {en}, url = {http://dml.mathdoc.fr/item/01907873} }
Lu, Zhiqin. On the rigidity of horizontal slices.. Portugaliae Mathematica. Nova Série, Tome 59 (2002) pp. 409-433. http://gdmltest.u-ga.fr/item/01907873/