Bosello C.A.; Nibbi R., A well-posed problem for electromagnetic media with quadrupoles, «MATHEMATICAL METHODS IN THE APPLIED SCIENCES», 2003, 26, pp. 375 - 388 [articolo]
Bosello C.A.; Nibbi R., A principle of constrained minimum in electromagnetism, «INTERNATIONAL JOURNAL OF ENGINEERING SCIENCE», 1999, 37, pp. 253 - 268 [articolo]
