acknowledgements [acknowledgments]

(n.) = agradecimientos

Def: Sección que aparece al principio o al final de un documento en el que el autor da las gracias a una persona o entidad por la labor realizada en conexión con el documento en cuestión.
Ex: Acknowledgements: the author wishes to acknowledge her debt to the authors of the literature that has gone before, and also to the various persons and organisations that have kindly permitted the reproduction of their work.