@Book{a6723165,
author = "Everett, Percival",
title = "X",
publisher = "Barcelona ",
year = ""
}
Warning: Unknown: write failed: No space left on device (28) in Unknown on line 0
Warning: Unknown: Failed to write session data (files). Please verify that the current setting of session.save_path is correct (/var/lib/php/sessions) in Unknown on line 0