Chalk, A. J.; Halpern, J. (1959). "Medium Effects in the Homogeneous Catalytic Activation of Molecular Hydrogen by Metal Salts. I. Cupric and Cuprous Heptanoates in Heptanoic Acid1". Journal of the American Chemical Society. 81 (22). American Chemical Society (ACS): 5846–5852. doi:10.1021/ja01531a002. ISSN0002-7863.
Halpern, Jack (1 August 1982). "Determination and significance of transition metal-alkyl bond dissociation energies". Accounts of Chemical Research. 15 (8). American Chemical Society (ACS): 238–244. doi:10.1021/ar00080a002. ISSN0001-4842.
Chalk, A. J.; Halpern, J. (1959). "Medium Effects in the Homogeneous Catalytic Activation of Molecular Hydrogen by Metal Salts. I. Cupric and Cuprous Heptanoates in Heptanoic Acid1". Journal of the American Chemical Society. 81 (22). American Chemical Society (ACS): 5846–5852. doi:10.1021/ja01531a002. ISSN0002-7863.
Halpern, Jack (1 August 1982). "Determination and significance of transition metal-alkyl bond dissociation energies". Accounts of Chemical Research. 15 (8). American Chemical Society (ACS): 238–244. doi:10.1021/ar00080a002. ISSN0001-4842.