"default" bibliography style in custom layout

[John K. Parejko]

Hello,

I’m working with a custom LaTeX class[1], based off of article, and I’ve made a 
LyX layout for it (attached below, modified from article.layout) that works 
well so far, except for the bibliography. The latex class specifies the 
bibliography style:

\bibliographystyle{lsst_aa}

and there is no option in LyX’s BibTeX Bibliography window to use the “default” 
style, nor can I figure out a way to modify the custom layout file to not 
insert \bibliographystyle. Thus, the document cannot be built because there 
will be two styles.

Is there a command to add to the layout file to prevent LyX from adding the 
bibliography style? Based on looking at other existing layouts, I tried adding 
either

```
Style Bibliography
End
```

or

```
NoStyle Bibliography
```

but neither prevented `\bibliographystyle{…}` from being included in the 
produced LaTeX. I can add an ERT box with `\bibliography{…}` at the end of the 
LyX doc, but it’d be nice to remove that ERT.

Any suggestions on how to modify my LyX layout, or otherwise tell the 
bibliography to not specify style in the output?

Thank you,
John

1: 
https://github.com/lsst/lsst-texmf/blob/master/texmf/tex/latex/lsst/lsstdoc.cls

2: lsstdoc.layout

#% Do not delete the line below; configure depends on this
#  \DeclareLaTeXClass[lsstdoc, article]{LSST doc (Standard Class based on 
article)}
#  \DeclareCategory{Articles}
# Article textclass definition file. Taken from initial LyX source code
# Author : Matthias Ettrich <ettr...@informatik.uni-tuebingen.de>
# Transposed by Pascal André <an...@via.ecp.fr>
# Heavily modifed and enhanced by serveral developers.
# Modified by John Parejko for LSST doc

# NOTE: To use this with your LyX doc, you can select it as a "Local Layout"
# NOTE: in Document->Settings->Document Class.

Format 60
Input stdclass.inc

SecNumDepth             3
TocDepth                3

NoStyle Chapter
NoCounter chapter
NoStyle Chapter*

# lsstdoc loads a number of packages itself
Provides hyperref 1
Provides geometry 1
Provides color 1
Provides babel 1
Provides natbib 1

# Provide the Insert->Short Title option
Style Title
    Argument 1
      LabelString   "Short Title|S"
      Tooltip       "Short title which will appear in the running header"
      InsertCotext  1
    EndArgument
End

Style Part
        Align                 Left
        AlignPossible         Left
        TopSep                2
        BottomSep             1.5
        Font
          Size                Larger
        EndFont
End


Style Part*
        Align                 Left
        AlignPossible         Left
        TopSep                2
        BottomSep             1.5
        Font
          Size                Larger
        EndFont
End