- C. Cortés, José Miguel DÃaz-Báñez, P. Pérez-Lantero, Carlos Seara, Jorge Urrutia, Inmaculada Ventura. Bichromatic separability with two boxes: A general approach. J. Algorithms, 64(2-3):79-88, 2009.
- Hugo L. Jonker, Sjouke Mauw, Jun Pang. A formal framework for quantifying voter-controlled privacy. J. Algorithms, 64(2-3):89-105, 2009.
- Mauricio Osorio, Ivan Olmos. Preface. J. Algorithms, 64(1):1-2, 2009.
- Claudio A. Policastro, Roseli A. F. Romero, Giovana Zuliani, Ednaldo Brigante Pizzolato. Learning of shared attention in sociable robotics. J. Algorithms, 64(4):139-151, 2009.
- Roxana Dánger, Rafael Berlanga Llavori. Generating complex ontology instances from documents. J. Algorithms, 64(1):16-30, 2009.
- Kostas Stathis, Artur S. d Avila Garcez, Robert Givan. Preface: Reinforcement Learning. J. Algorithms, 64(4):125-126, 2009.
- David Pinto, Jorge Civera, Alberto Barrón-Cedeño, Alfons Juan, Paolo Rosso. A statistical approach to crosslingual natural language tasks. J. Algorithms, 64(1):51-60, 2009.
- Claudia Zepeda, José Luis Carballido. P-stable models of strong kernel programs. J. Algorithms, 64(1):41-50, 2009.
- Pierre Flener, Justin Pearson. Solving necklace constraint problems. J. Algorithms, 64(2-3):61-73, 2009.
- Andriy Burkov, Brahim Chaib-draa. Effective learning in the presence of adaptive counterparts. J. Algorithms, 64(4):127-138, 2009.