@article{NSJOM_1999_29_3a_0,
     author = {I.D. 

 Albu and D. Oprig},
     title = {A {Hamiltonian} approadi to the disrrete-eonthmon.s 

 dvnanrieal svstems in dia.mond-type crystals},
     journal = {Novi Sad Journal of Mathematics},
     pages = {1-9},
     publisher = {mathdoc},
     volume = {29},
     number = {3},
     year = {1999},
     url = {http://geodesic.mathdoc.fr/item/NSJOM_1999_29_3a_0/}
}