@misc { 
	google_calendar_api,
	title 	= "Google Calendar API",
	url		= "https://developers.google.com/google-apps/calendar/",
	year	= "2013"
}

@misc { 
	codeigniter_reference,
    author 	= "",
    title 	= "CodeIgniter Reference",
    url		= "http://ellislab.com/codeigniter/user-guide/toc.html",
	year	= "2013"
}
	
@misc {
	software_engineering_notes,
	author	= "Νικόλαος Πεταλίδης",
	title	= "Σημειώσεις των μαθημάτων Τεχνολογία Λογισμικού 1 \& 2.",
	year	= "2012"
}