Helmut A. Abt, Nidia I. Morrell: The Relation between Rotational Velocities and Spectral Peculiarities among A-Type Stars. In: The Astrophysical Journal Supplement Series. 99. Jahrgang, 1995, S.135–172, doi:10.1086/192182, bibcode:1995ApJS...99..135A (harvard.edu [PDF]). (Datensatz auf VizieR).
Helmut A. Abt, Nidia I. Morrell: The Relation between Rotational Velocities and Spectral Peculiarities among A-Type Stars. In: The Astrophysical Journal Supplement Series. 99. Jahrgang, 1995, S.135–172, doi:10.1086/192182, bibcode:1995ApJS...99..135A (harvard.edu [PDF]). (Datensatz auf VizieR).
S. W. Burnham: Sixteenth Catalogue of New Double Stars Discovered at the Lick Observatory. In: Publications of Lick Observatory. 2. Jahrgang, 1894, S.197–205, bibcode:1894PLicO...2..197B.
Helmut A. Abt, Nidia I. Morrell: The Relation between Rotational Velocities and Spectral Peculiarities among A-Type Stars. In: The Astrophysical Journal Supplement Series. 99. Jahrgang, 1995, S.135–172, doi:10.1086/192182, bibcode:1995ApJS...99..135A (harvard.edu [PDF]). (Datensatz auf VizieR).
Helmut A. Abt, Nidia I. Morrell: The Relation between Rotational Velocities and Spectral Peculiarities among A-Type Stars. In: The Astrophysical Journal Supplement Series. 99. Jahrgang, 1995, S.135–172, doi:10.1086/192182, bibcode:1995ApJS...99..135A (harvard.edu [PDF]). (Datensatz auf VizieR).