Fujitaki, J.M., Fung, G., Oh, E.Y. and Smith, R.A. (1981). „Characterization of chemical and enzymatic acid-labile phosphorylation of histone H4 using phosphorus-31 nuclear magnetic resonance”. Biochemistry. 20: 3658—3664. PMID7196259.CS1 одржавање: Вишеструка имена: списак аутора (веза)
Huebner, V.D. & Matthews, H.R. (1985). „Phosphorylation of histidine in proteins by a nuclear extract of Physarum polycephalum plasmodia”. J. Biol. Chem. 260: 16106—16113. PMID4066704.
