Lamentations Chant in Spanish Sources: A Preliminary Report, in Chant and its Peripheries: Essays in Honour of Terence Bailey edited by Bryan Gillingham and Paul Merkley, Ottawa: Institute of Mediaeval Music. 1998, pages 370-389 Jane M Hardie

https://www.academia.edu/12007080/Lamentations_Chant_in_Spanish_Sources_A_Preliminary_Report_in_Chant_and_its_Peripheries_Essays_in_Honour_of_Terence_Bailey_edited_by_Bryan_Gillingham_and_Paul_Merkley_Ottawa_Institute_of_Mediaeval_Music_1998_pages_370_389