@article {laios2009effectiveness,
	title = {The Effectiveness of External Cues on Learning Setting in Volleyball},
	journal = {International Journal of Performance Analysis in Sport},
	volume = {9},
	number = {1},
	year = {2009},
	pages = {90{\textendash}99},
	publisher = {University of Wales Institute, Cardiff},
	url = {http://www.ingentaconnect.com/content/uwic/ujpa/2009/00000009/00000001/art00008},
	author = {Laios, Yannis and Kountouris, Panayiotis}
}
