@book{34133,
	author = {Glasman, Joël},
	title = {Chapter 1 Concepts},
	url = {https://library.oapen.org/bitstream/20.500.12657/51116/1/9781003006954_10.4324_9781003006954-2.pdf||https://library.oapen.org/bitstream/20.500.12657/51116/11/9781003006954_10.4324_9781003006954-2.pdf}
}