@misc{indiciae68b21d0acd83, title = {Hypothalamic motivational systems - Fixed or plastic neural circuits?}, author = {Cox, V. C. and Kakolewski, J. W. and Valenstein, E. S.}, year = {1969}, url = {https://ntrs.nasa.gov/citations/19690043321}, note = {Source identifier: 19690043321} }