%0 Journal Article %J Energy & Fuels %D 2016 %T Single-Core PAHs in Petroleum- and Coal-Derived Asphaltenes: Size and Distribution from Solid-State NMR Spectroscopy and Optical Absorption Measurements %A R. Dutta Majumdar %A K. D. Bake %A Y. Ratna %A A. E. Pomerantz %A O. C. Mullins %A M. Gerken %A P. Hazendonk %B Energy & Fuels %V 30 %P 6892-6906 %G eng