Source:
Proceedings of the Royal Society of London. Series A, Containing Papers of a Mathematical and Physical Character ; volume 124, issue 795, page 654-667 ; ISSN 0950-1207 2053-9150
Source:
Proceedings of the Royal Society of London. Series A, Containing Papers of a Mathematical and Physical Character ; volume 126, issue 803, page 661-674 ; ISSN 0950-1207 2053-9150
Source:
Proceedings of the Royal Society of London. Series A, Containing Papers of a Mathematical and Physical Character ; volume 139, issue 838, page 336-342 ; ISSN 0950-1207 2053-9150
Source:
Proceedings of the Royal Society of London. Series A, Containing Papers of a Mathematical and Physical Character ; volume 141, issue 843, page 209-215 ; ISSN 0950-1207 2053-9150
Source:
Proceedings of the Royal Society of London. Series A - Mathematical and Physical Sciences ; volume 149, issue 866, page 56-70 ; ISSN 0080-4630 2053-9169