@article {mamalis2003simple,
	title = {Simple design of photonic crystal MMI couplers.},
	journal = {WSEAS Transactions on Communications},
	volume = {2},
	number = {2},
	year = {2003},
	pages = {334{\textendash}337},
	author = {Mamalis, M and Varoutas, D and Chipouras, A and Kamalakis, Th}
}
