@article{AM2_1994__48_2-3_137604,
     author = {Liviu I. Nicolaescu},
     title = {Rigidity of generalized laplacians and some geometric applications.},
     journal = {Aequationes mathematicae},
     pages = {143--162},
     publisher = {mathdoc},
     volume = {48},
     number = {2-3},
     year = {1994},
     zbl = {0818.58050},
     url = {http://geodesic.mathdoc.fr/item/AM2_1994__48_2-3_137604/}
}