Vlachopoulos, S. P., Asci, F. H., Cid, L., Ersoz, G., González-Cutre, D., Moreno-Murcia, J. A., y Moutão, J. (2013). Cross-cultural invariance of the basic pschological needs in exercise scale and need satisfaction latent mean differences among Greek, Spanish, Portuguese and Turkish Samples. Psychology of Sport and Exercise, 14, 622-631.