About the stability and positivity of a class of discrete nonlinear systems of difference equations Egileak: De la Sen, M. Urtea: 2008 Aldizkaria: Discrete Dynamics in Nature and Society Liburukia: 2008, art. no. 595367 Informazio gehigarria http://www.scopus.com/inward/record.url?eid=2-s2.0-55849128166&partnerID=40&md5=f7ed129566109f0e97c72d098f983353