Summary
More than 6000 cpm systems including 400 pairs having at least one degenerate component have been discovered to-day by the author.
The others are mainly Main-Sequence stars less luminous than the Sun precisely the kind which fits in the best populous part of luminosity function.
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Luyten, W.J. Wide double stars with common proper motion. Astrophys Space Sci 142, 17–19 (1988). https://doi.org/10.1007/BF00656176
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DOI: https://doi.org/10.1007/BF00656176