1. J. Boussinesq, Recherches théoriques sur l’écoulement des nappes d’eau infiltrées dans le sol et sur le débit des sources, J. Math. Pures Appl., 10 (1904) 5–78.
  2. P. Ya. Polubarinova-Kochina, On a Non-Linear Partial Differential Equation Occurring in Seepage Theory, Doklady Akademii Nauk, 36, 1948 (in Russian).
  3. P. Ya. Polubarinova-Kochina, On Unsteady Flow of Groundwater Seeping From Reservoirs, Prikladnaya Mathematika i Makhanika, 32, 1949 (in Russian).
  4. P. Ya. Polubarinova-Kochina, Theory of Groundwater Movement, 2015, 1st ed., Princeton University Press, USA, 1962, pp. 497–517.
  5. P.K. Tolikas, E.G. Sidiropoulos, C.D. Tzimopoulos, A simple analytical solution for the Boussinesq one-dimensional groundwater flow equation, Water Resour. Res., 20 (1984) 24–28.
  6. D.A. Lockington, Response of unconfined aquifer to sudden change in boundary head, J. Irrig. Drain. Eng., 123 (1997) 24–27.
  7. K.N. Moutsopoulos, The analytical solution of the Boussinesq equation for flow induced by a step change of the water table elevation revisited, Transp. Porous Media, 85 (2010) 919–940.
  8. D.A. Lockington, J.-Y. Parlange, M.B. Parlange, J. Selker, Similarity solution of the Boussinesq equation, Adv. Water Resour., 23 (2000) 725–729.
  9. H.A. Basha, Traveling wave solution of the Boussinesq equation for groundwater flow in horizontal aquifers, Water Resour. Res., 49 (2013) 1668–1679.
  10. T. Chor, N.L. Dias, A.R. de Zarate, An exact series and improved numerical and approximate solutions for the Boussinesq equation, Water Resour. Res., 49 (2013) 7389–7387.
  11. Q.H. Jiang, Y.H. Tang, A general approximate method for the groundwater response problem caused by water level variation, J. Hydrol., 529 (2015) 398–409.
  12. M. Hayek, Accurate approximate semi-analytical solutions to the Boussinesq groundwater flow equation for recharging and discharging of horizontal unconfined aquifers, J. Hydrol., 570 (2019) 411–422.
  13. Z.-X. Chen, G.S. Bodvarsson, E.A. Witherspoon, Y.C. Yortsos, An integral equation formulation for the unconfined flow of groundwater with variable inlet conditions, Transp. Porous Media, 18 (1995) 15–36.
  14. S.E. Serrano, S.R. Workman, Modeling transient stream/aquifer interaction with the non-linear Boussinesq equation and its analytical solution, J. Hydrol., 206 (1998) 245–255.
  15. J.-Y. Parlange, W.L. Hogarth, R.S. Govindaraju, M.B. Parlange, D. Lockington, On an exact analytical solution of the Boussinesq equation, Transp. Porous Media, 39 (2000) 339–345.
  16. A.S. Telyakovskiy, G.A. Braga, F. Furtado, Approximate similarity solutions to the Boussinesq equation, Adv. Water Resour., 25 (2002) 191–194.
  17. A. Pistiner, Similarity solution to unconfined flow in an aquifer, Transp. Porous Media, 71 (2008) 265–272.
  18. J.S. Olsen, A.S. Telyakovskiy, Polynomial approximate solutions of a generalized Boussinesq equation, Water Resour. Res., 49 (2013) 3049–3053.
  19. H. Aminikhah, Approximate analytical solution for the onedimensional nonlinear Boussinesq equation, Int. J. Numer. Methods Heat Fluid Flow, 25 (2015) 831–840.
  20. M.S. Bartlett, A. Porporato, A class of exact solutions of the Boussinesq equation for horizontal and sloping aquifers, Water Resour. Res., 54 (2018) 767–778.
  21. O. Wiedeburg, Über die Hydrodiffusion, Annalen der Physik, 277 (1890) 675–711.
  22. R. Revelli, L. Ridolfi, Influence zone of recharging-dewatering actions in unconfined aquifer, J. Irrig. Drain. Eng., 126 (2000) 110–112.
  23. K.N. Moutsopoulos, A simple model for the simulation of the flow behavior in unconfined double porosity aquifers, J. Hydrol., 596 (2021) 126076, doi: 10.1016/j.jhydrol.2021.126076.