An investigation of the outer valance orbital electron density distribution of ethylene by electron momentum spectroscopy at 800 eVG. Q. Li, J. K. Deng, J. D. Huang, X. D. Wang and Y. ZhengEur. Phys. J. D, 33 3 (2005) 387-391DOI: https://doi.org/10.1140/epjd/e2005-00061-5