Document Classes ⇒ How to combine multiple IEEEtran articles without losing style

[anthony1]

I'm trying to merge multiple IEEEtran articles into one file, without losing style. Here's the original file (title block looks nice and clean):

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\documentclass[journal,transmag]{IEEEtran}

\begin{document}

    \title{Bare Demo of IEEEtran.cls for \textsc{Transactions on Magnetics}}
    \author{\IEEEauthorblockN{Michael Shell\IEEEauthorrefmark{1},
            Homer Simpson\IEEEauthorrefmark{2},
            James Kirk\IEEEauthorrefmark{3}, 
            Montgomery Scott\IEEEauthorrefmark{3}, and
            Eldon Tyrell\IEEEauthorrefmark{4},~\IEEEmembership{Fellow,~IEEE}}
        \IEEEauthorblockA{\IEEEauthorrefmark{1}School of Electrical and Computer Engineering,
            Georgia Institute of Technology, Atlanta, GA 30332 USA}
        \IEEEauthorblockA{\IEEEauthorrefmark{2}Twentieth Century Fox, Springfield, USA}
        \IEEEauthorblockA{\IEEEauthorrefmark{3}Starfleet Academy, San Francisco, CA 96678 USA}
        \IEEEauthorblockA{\IEEEauthorrefmark{4}Tyrell Inc., 123 Replicant Street, Los Angeles, CA 90210 USA}% <-this % stops an unwanted space
        }
    \markboth{Journal of \LaTeX\ Class Files,~Vol.~13, No.~9, September~2014}%
    {Shell \MakeLowercase{\textit{et al.}}: Bare Demo of IEEEtran.cls for Journals} 
    \maketitle  

\end{document}

When i'm trying to merge couple of articles into one file using Combine, title block style seems broken:

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\documentclass[colclass=IEEEtran,journal,transmag]{combine}

\begin{document}

    \title{Bare Demo of IEEEtran.cls for \textsc{Transactions on Magnetics}}
    \author{\IEEEauthorblockN{Michael Shell\IEEEauthorrefmark{1},
            Homer Simpson\IEEEauthorrefmark{2},
            James Kirk\IEEEauthorrefmark{3}, 
            Montgomery Scott\IEEEauthorrefmark{3}, and
            Eldon Tyrell\IEEEauthorrefmark{4},~\IEEEmembership{Fellow,~IEEE}}
        \IEEEauthorblockA{\IEEEauthorrefmark{1}School of Electrical and Computer Engineering,
            Georgia Institute of Technology, Atlanta, GA 30332 USA}
        \IEEEauthorblockA{\IEEEauthorrefmark{2}Twentieth Century Fox, Springfield, USA}
        \IEEEauthorblockA{\IEEEauthorrefmark{3}Starfleet Academy, San Francisco, CA 96678 USA}
        \IEEEauthorblockA{\IEEEauthorrefmark{4}Tyrell Inc., 123 Replicant Street, Los Angeles, CA 90210 USA}% <-this % stops an unwanted space
    }
    \markboth{Journal of \LaTeX\ Class Files,~Vol.~13, No.~9, September~2014}%
    {Shell \MakeLowercase{\textit{et al.}}: Bare Demo of IEEEtran.cls for Journals} 
    \maketitle  

\end{document}

TexStudio marks \IEEEauthorblockN and \IEEEauthorblockA as unrecognized commands. As far as i understand, Combine package suppress IEEEtran commands.

How can i use Combine without losing IEEEtran style? I want merged articles to keep its original style. Is there a more elegant way of merging articles?

logs:

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Expect warnings like:(combine) LaTeX Warning: Unused global option(s):(combine) [colclass=IEEEtran].
Unused global option(s): [colclass=IEEEtran].
Overfull \hbox (1322.6119pt too wide) in paragraph
Unused global option(s): [colclass=IEEEtran].

[Johannes_B]

Why don't you use pdfpages or a tool like pdfmerge to merge the already finished pdf files?