@article {1987,
	title = {Lie algebra extensions and abelian monopoles.},
	journal = {Phys. Lett. B  195  (1987),  no. 3, 429-434},
	number = {SISSA;25/87/FM},
	year = {1987},
	publisher = {SISSA Library},
	doi = {10.1016/0370-2693(87)90043-8},
	url = {http://hdl.handle.net/1963/506},
	author = {Giovanni Landi and Giuseppe Marmo}
}
