Kratz, Werner (2009)

Advances in Difference Equations [electronic only]

Agarwal, Ravi P., Otero-Espinar, Victoria, Perera, Kanishka, Vivero, Dolores R. (2006)

Advances in Difference Equations [electronic only]

Ren, Yaping, Li, Yongkun (2007)

International Journal of Mathematics and Mathematical Sciences

Eligiusz Mieloszyk (1990)

Czechoslovak Mathematical Journal

Marini, Mauro, Matucci, Serena, Řehák, Pavel (2006)

Advances in Difference Equations [electronic only]

Ahmad, Bashir, Ntouyas, Sotiris K. (2011)

Abstract and Applied Analysis

Thandapani, E., Karunakaran, R., Arockiasamy, I.M. (2009)

Electronic Journal of Qualitative Theory of Differential Equations [electronic only]

Mawhin, Jean (2009)

Electronic Journal of Differential Equations (EJDE) [electronic only]

Anderson, Douglas R. (2006)

Advances in Difference Equations [electronic only]

Akin-Bohner, Elvan, Raffoul, Youssef N. (2006)

Advances in Difference Equations [electronic only]

Pachpatte, B.G. (2002)

JIPAM. Journal of Inequalities in Pure & Applied Mathematics [electronic only]