@article {katsikisadditive,
	title = {Additive Mappings between Directed Wedges with the Riesz Interpolation Property},
	journal = {Int. Journal of Math. Analysis},
	volume = {2},
	number = {1},
	year = {2008},
	pages = {11-25},
	author = {Vasilios N. Katsikis}
}
