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\bibitem{design2}   Holdaway, M. A., & Helfer, T. T. 1999 in  \textit{Synthesis Imaging in Radio Astronomy II}.   eds. G. B. Taylor, C. L. Carilli, & R. A. Perley (San Francisco: ASP), 477-500. 537-563.  \bibitem{cost1}   Clark, B. G. 2001 in  \textit{EVLA \textit{\href{http://library.nrao.edu/public/memos/evla/EVLAM_29.pdf}{EVLA  Memo 29 - Towards a Cost Equation for Multi-element station}.   (Socorro). station}}.   (Socorro, NM).  \bibitem{cost2}   Weinreb, S. 1986 in  \textit{\href{http://library.nrao.edu/public/memos/alma/memo006.pdf}{ALMA Memo 6 - Cost Equation for a Millimeter Wave Array}}.   (Charlottesville, VA).  \end{thebibliography}  \begin{itemize}  \itemTowards cost equation for a multi-element array - http://www.aoc.nrao.edu/evla/geninfo/memoseries/evlamemo29.ps.gz  \item  Cost Equation for a Millimetre Wave Array -http://library.nrao.edu/public/memos/alma/memo006.pdf  \item Cost diameter curves - http://library.nrao.edu/public/memos/alma/memo022.pdf  \item Millimeter Array Cost Equation Correction - http://library.nrao.edu/public/memos/alma/memo055.pdf  \item Cost Benefit analysis for a number of MMA configurations for 30 10m antennas - http://library.nrao.edu/public/memos/alma/memo199.pdf  \item Same as above, for 64 12m antennas - http://library.nrao.edu/public/memos/alma/memo265.pdf  \end{itemize}