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Hi Rainer,

sorry for the late answer.
You are right, it would be much more elegant to have 'Astrophysical Journal' than 'apj' in the bibliography.
I found the sty file
http://cdsads.u-strasbg.fr/abs_doc/aas_macros.sty
with all of the definitions, and I include it in the preamble
(\documentclass ...

Hi Rainer,

thank you for the reply!
Actually, I realized that the source I take the citations from automatically puts the backslash there
and it can not be configured to leave it out, so I have to manually remove them.
There are numerous journals I cite so making a \newcommand for all of them would ...

Hi,

I'm having an "undefined control sequence" problem when trying to compile the tex source.

LaTeX Warning: Citation `article2019' on page 2 undefined on input line 26.

(./texfile.bbl [2]
! Undefined control sequence.
l.6 \newblock {\em \apj
}, 42:44, July 2018.

I discovered that if I remove ...