Fekel, Francis C.; Balachandran, Suchitra (February 1993), "Lithium and rapid rotation in chromospherically active single giants", Astrophysical Journal, Part 1, 403 (2): 708–721, Bibcode:1993ApJ...403..708F, doi:10.1086/172242.
Fekel, Francis C.; Balachandran, Suchitra (February 1993), "Lithium and rapid rotation in chromospherically active single giants", Astrophysical Journal, Part 1, 403 (2): 708–721, Bibcode:1993ApJ...403..708F, doi:10.1086/172242.