ISBN 0-8122-3956-3* Glendinning, Nigel, «The Strange Translation of Goya's Black Paintings», "The Burlingon Magazine", CXVII, 868, 1975.
ISBN 84-89162-75-1* GLENDINNING, Nigel, «The Strange Traslation of Goya’s Black Paintings», "The Burlingon Magazine", CXVII, 868, 1975.