Editing Appendix/Ramblings/CCGF (section)

==Selected Citations from Astrophysicists==
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(2019) ''A Fast Poisson Solver of Second-order Accuracy for Isolated Systems in Three-dimensional Cartesian and Cylindrical Coordinates'', by S. Moon, W.-T. Kim &amp; E. C. Ostriker, [https://ui.adsabs.harvard.edu/abs/2019ApJS..241...24M/abstract ApJS, Volume 241, Issue 2, 24]
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(2019) ''AGAMA: action-based galaxy modelling architecture'', by E. Vasiliev, [https://ui.adsabs.harvard.edu/abs/2019MNRAS.482.1525V/abstract MNRAS, Volume 482, Issue 2, p. 1525 - 1544]
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(2016) ''Equilibrium sequences and gravitational instability of rotating isothermal rings'', by W.-T. Kim &amp; S. Moon, [http://iopscience.iop.org/article/10.3847/0004-637X/829/1/45/meta ApJ, Volume 829, Number 1]
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(2016) ''Zonal toroidal harmonic expansions of external gravitational fields for ring-like objects'', by T. Fukushima, [http://iopscience.iop.org/article/10.3847/0004-6256/152/2/35/meta The Astronomical Journal, Volume 152, Number 2]
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<sup>&dagger;</sup>(2016) ''Vector potentials for the gravitational interaction of extended bodies and laminas with analytical solutions for two disks'', by J. T. Conway, [https://link.springer.com/article/10.1007/s10569-016-9679-y Celestial Mechanics and Dynamical Astronomy, Volume 125, Issue 2, pp. 161-194]
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(2015) ''Applying Schwarzschild's orbit superposition method to barred or non-barred disc galaxies'', by E. Vasiliev &amp; E. Athanassoula, [https://academic.oup.com/mnras/article/367/3/1297/1042268 MNRAS, Volume 450, Issue 3]
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(2012) ''A substitute for the singular Green kernel in the Newtonian potential of celestial bodies'', by J.-M. Our&eacute; &amp; A. Dieckmann, [https://www.aanda.org/articles/aa/pdf/forth/aa18443-11.pdf Astronomy &amp; Astrophysics, Volume 541, A130]
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(2007) ''The Newtonian force experienced by a point mass near a finite cylindrical source'', by J. P. Selvaggi, Sheppard Salon &amp; M. V. K. Chari, [http://iopscience.iop.org/article/10.1088/0264-9381/25/1/015013/meta Classical and Quantum Gravity, Volume 25, Number 1]
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(2006) ''Self-consistent response of a galactic disc to vertical perturbations'', by K. Saha &amp; C. J. Jog, [https://academic.oup.com/mnras/article-abstract/450/3/2842/1068852 MNRAS, Volume 367, Issue 3]
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(2005) ''Accurate numerical potential and field in razor-thin, axisymmetric disks'', by J.-M. Our&eacute;, [http://iopscience.iop.org/article/10.1086/428769/meta ApJ, Volume 624, Number 1]
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(2004) ''Evolution of self-gravitating magnetized disks.  I. Axisymmetric simulations'', by S. Forming, S. A. Balbus, &amp; J.-P. De Villers, [http://iopscience.iop.org/article/10.1086/424828/meta ApJ, Volume 616, Number 1]
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