(en) J.T. Chen, C.S. Wua et K.H. Chenb, « A study of free terms for plate problems in the dual boundary
integral equations », Engineering Analysis with Boundary Elements, ; vol. 29, p. 73-374 ; vol. 47, 1854, p. 435-446. [1].
nottingham.ac.uk
(en) George Green, « An essay on the application of mathematical analysis to the theory of electricity & magnetism », J. reine angew. Math., vol. 39, , p. 73-79 ; vol. 44, 1852, p. 356-374 ; vol. 47, 1854, p. 161-221. Fac-similé du mémoire original de 1828.