L. Bump

A Field Study of Traditional and Nontraditional Children's Baseball

R. Martens, Francine V. Rivkin, L. Bump, 1984 .

Psychological Predictors of State Anxiety and Performance in Age-Group Wrestlers

D. Gould, R. Eklund, K. Peterson, 1991 .

Competitive State Anxiety Inventory—2

R. Vealey, R. Martens, D. Burton, 2014 .