MICHAUD, Georges. Diffusion Processes in Peculiar A Stars. Astrophysical Journal, May 1970, s. 641 – 658. Dostupné online. DOI: 10.1086/150459.
Elemental Abundance Analyses with Coadded DAO Spectrograms – Part Five – the Mercury-Manganese Stars Phi-Herculis 28-HERCULIS and HR:7664. Monthly Notices of the Royal Astronomical Society, December 1988, s. 763. DOI: 10.1093/mnras/235.3.763.
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MICHAUD, Georges. Diffusion Processes in Peculiar A Stars. Astrophysical Journal, May 1970, s. 641 – 658. Dostupné online. DOI: 10.1086/150459.