@article {31501,
	title = {Emerging Trends and Future Directions for the Field of Motivation Psychology: A Special Issue in Honor of Prof. Dr. Willy Lens},
	journal = {Psychologica BelgicaPsychologica Belgica},
	volume = {56},
	year = {2016},
	pages = {118{\textendash}142},
	author = {Vansteenkiste, M. and Mouratidis, A.}
}
