- Author: Martinez Estrada
- Language: Spanish
- Author: Karl E. Meyer
- Language: Spanish
- Year: 1990
- Author: María Rosa Lida de Malkiel
- Language: Spanish
- Year: 1983
- Author: Ryszard Kapuscinski K. Straczek (editor)
- Language: Italian
- Year: 2017
- Author: Septimiu Chelcea
- Language: Romanian
- Year: 2001
Ontologia II
pdf
- Author: Nicolai Hartmann
- Language: Spanish
- Year: 1986
Ontologia I
pdf
- Author: Nicolai Hartmann
- Language: Spanish
- Year: 1965
- Author: Jorge Llorente Bousquets
- Language: Spanish
- Year: 1990
- Author: George Steiner
- Language: Spanish
- Year: 2015
- Author: Steven Vogel
- Language: Spanish
- Year: 2018