• [1] Luigi Amerio, Soluzioni quasi-periodiche, o limitate, di sistemi diferenziali non lineari quasi-periodici, o limitati, Ann. Mat. Pura Appl. (4) 39 (1955), 97–119 (Italian). MR 79687, https://doi.org/10.1007/BF02410765
• [2] G. I. Biryuk, On the existence of almost periodic solutions of nonlinear systems with a small parameter in the case of degeneration, Doklady Akad. Nauk SSSR (N.S.) 97 (1954), 577–579 (Russian). MR 0064239
• [3] Juan Jorge Schäffer, Analytische Parameterabhängigkeit der fastperiodischen Lösungen von nichtlinearen Differentialgleichungen, Rend. Circ. Mat. Palermo (2) 5 (1956), 204–236 (German). MR 82594, https://doi.org/10.1007/BF02854356
• [4] G. E. H. Reuter, On certain non-linear differential equations with almost periodic solutions, J. London Math. Soc. 26 (1951), 215–221. MR 43296, https://doi.org/10.1112/jlms/s1-26.3.215
• [5] W. S. Loud, Boundedness and convergence of solutions of 𝑥”+𝑐𝑥’+𝑔(𝑥)=𝑒(𝑡), Duke Math. J. 24 (1957), 63–72. MR 85415

Bibliography

[1]

L. Amerio, Soluzioni quasi-periodiche, o limitate, di sistemi differenziali non lineari quasi-periodici, o limitati, Ann. Mat. Pura Appl. vol. 39 (1955) pp. 97-119. MR 0079687 (18:128b)

[2]

G. I. Biryuk, On the existence of almost periodic solutions of nonlinear systems with a small parameter in the case of degeneration, Dokl. Akad. Nauk. SSSR (N.S.) vol. 97 (1954) pp. 577-579. MR 0064239 (16:249c)

[3]

J. J. Schäffer, Analytische Parameterabhängigkeit der fastperiodische Lösungen von nichtlinearen Differentialgleichungen, Rend. Circ. Mat. Palermo (2) vol. 5 (1956) pp. 204-236. MR 0082594 (18:576g)

[4]

G. E. H. Reuter, On certain nonlinear differential equations with almost periodic solutions, J. London Math. Soc. vol. 26 (1951) pp. 215-221. MR 0043296 (13:237f)

[5]

W. S. Loud, Boundedness and convergence of solutions of , Duke Math. J. vol. 24 (1), (1957) pp. 63-72. MR 0085415 (19:36c)