1) Human Movement Science 17 (1998) 201-220
The moment arms of 23 muscle segments of the upper limb
with varying elbow and forearm positions: Implications for
motor control
G.J.C. Ettema *
, G. Styles, V. Kippers
http://people.stfx.ca/smackenz/courses/DirectedStudy/Articles/Ettema%201998%20The%20moment%20arms%20of%2023%20muscle%20segments%20of%20the%20upper%20limb.pdf
2)Muscular coordination of biceps brachii and brachioradialis in elbow flexion with respect to hand position.
Kleiber T1, Kunz L2, Disselhorst-Klug C2.
https://www.ncbi.nlm.nih.gov/pubmed/26300781