Screening of cellulolytic bacteria from various ecosystems and their cellulases production under multi-stress conditions / Amel Balla, Allaoua Silini, Hafsa Cherif-Silini, Ali Chenari Bouket, Amel Boudechicha, Lenka Luptáková, Faizah N. Alenezi, Lassaad Belbahri KE304