Graphical Techniques for Multivariate Data.
S. E. Siday, Barry J. Everitt · Journal of the Royal Statistical Society Series D (The Statistician) · 1978
S. E. Siday, Journal of the Royal Statistical Society. Series D (The Statistician), Vol. 27, No. 3/4, Partial Proceedings of the 1978 I.O.S. Annual Conference on Time Series Analysis (and Forecasting) (Sep. - Dec., 1978), pp. 266-267