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Mosberg, H I., R. Hurst, V J. Hruby, K. Gee, H I. Yamamura, J J. Galligan, and T F. Burks. Bis-penicillamine Enkephalins Possess Highly Improved Specificity Toward Delta Opioid Receptors. 1983.

Mosberg, H I., et al. Bis-penicillamine Enkephalins Possess Highly Improved Specificity Toward Delta Opioid Receptors. 1983.