| 1992 |
| Spiros Cotsakis, Quiescent Self-Regenerating Universe, First Greek Astronomical Meeting, P. Laskarides, YES, 135-140, , 1992, Athens |
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| 1999 |
| Spiros Cotsakis, Mathematical problems in higher order gravity and cosmology, Eighth Marcel Grossman Meeting on General Relativity, T. Piran, R. Ruffni, YES, 505-507, , 1999, World Scientific |
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| 2002 |
| Spiros Cotsakis, P. Leach, Symmetries, Singularities and Integrability in Nonlinear Mathematical Physics and Cosmology, Fourth International Conference on Symmetries in Nonlinear Mathematical Physics, Proc. Inst. Math. N.A.S., 128-135, , 2002, Ukraine |
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| Spiros Cotsakis, J. Miritzis, Algebraic Integrability of FRW-Scalar Cosmologies, Ninth Marcel Grossman Meeting on General Relativity, V. Gurzadyan, R.T. Jantzen, R. Ruffni, YES, 1943-1945, , 2002, World Scientific |
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| Spiros Cotsakis, J. Miritzis, Scalar-Tensor σ-Cosmologies, Ninth Marcel Grossman Meeting on General Relativity, V. Gurzadyan, R.T. Jantzen, R. Ruffni, YES, 1945-1947, , 2002, World Scientific |
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| Spiros Cotsakis, Current Trends in Mathematical Cosmology, Modern Theoretical and Observational Cosmology, S. Cotsakis, M. Plionis, YES, 5-18, , 2002, Kluwer, ASSL276 |
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| Spiros Cotsakis, J. Miritzis, A Note on Wavemap-Tensor Cosmologies, Modern Theoretical and Observational Cosmology, S. Cotsakis, M. Plionis, YES, 67-74, , 2002, Kluwer, ASSL276 |
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| Spiros Cotsakis, P. Leach, Is Nature Generic?, Cosmological Crossroads, S. Cotsakis, E. Papantonopoulos, YES, 3-15, , 2002, Springer |
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| Spiros Cotsakis, Cosmological Singularities, Cosmological Crossroads, S. Cotsakis, E. Papantonopoulos, YES, 59-94, , 2002, Springer |
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| 2003 |
| Spiros Cotsakis, Y. Choquet-Bruhat, Completeness Theorems in General relativity, 10th Greek Relativity Conference, K. D. Kokkotas, N. Stergioulas, YES, 145-149, , 2003, World Scientific |
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