Helen Graham (2005). The Spanish Civil War: A Very Short Introduction. Very Short Introductions. Oxford University Press. p. 68. ISBN 978-0-19-280377-1.
Antony, Beevor (2006). The Battle for Spain. London: Phoenix. pp. 111–113.
Azurmendi, Joxe (2006): "Unamuno" in Espainiaren arimaz, Donostia: Elkar. ISBN 84-9783-402-X
Azurmendi, Joxe (2012): Bakea gudan. Unamuno, historia eta karlismoa, Tafalla, Txalaparta. ISBN 978-84-15313-19-9
Azurmendi, Joxe (2012): "Unamunoren atarian" in Alaitz Aizpuru (koord.), Euskal Herriko pentsamenduaren gida, Bilbo, UEU. ISBN 978-84-8438-435-9
Tragic Sense Of Life, I The Man Of Flesh And Bone
Vicente Palacios, Papirogami: Tradicional Arte del Papel Plegado (Barcelona: Miguel Salvatella, 1972), p. 122. The term "origami" for such works is recent, Unamuno's own being "cocotología".
↑ David Dunn, Sống vì mọi người, biên dịch: Nguyễn Kim Dân – NNT, Nhà xuất bản Lao động Xã hội, Hà Nội, năm 2008, trang 18
