Christiansen, H., Jaudoin, H., Chountas, P., Andreasen, T., & Larsen, H. L. (2020). Flexible Query Answering Systems. Springer International Publishing.

Christiansen, Henning, Hélène Jaudoin, Panagiotis Chountas, Troels Andreasen, و Henrik Legind Larsen. Flexible Query Answering Systems. Springer International Publishing, 2020.

Christiansen, Henning, et al. Flexible Query Answering Systems. Springer International Publishing, 2020.