求助一下三篇文献DOI，谢谢！

[1] Feltz D, Landers D M. The effects of mental practice on motor skill learning and performance_ A meta-analysis[J]. JOURNAL OF SPORT PSYCHOLOGY,1983(5):25-57.

 [2] Feltz D, Landers DM, Bj B. A revised meta-analysis of the mental practice literature on motor skill learning[J].    In Enhancing Human Performance: Issues, theories, and techniques. Edited by: Druckmann D, Swets JA. Washington D.C.National Academy Press,1988:61-101.

[3] Lutz R, Landers DM, De L. Procedural variables and skill level influences on pre-performance mental practice efficacy[J]. Journal of Mental Imagery,2001,25(3-4):115-134.

1和3是researchgate的文献，能下载的话，我也想见见这位站内大神