Fayard, M.; Gratias, D.; Portier, R.; Guymont, M. Electron diffraction 1927-1977. Invited and contributed papers from the international conference on electron diffraction held in London, 19-21 September 19771978
[en] The determination of the space operator associated with a merohedral twin in cubic Yb203 is performed by using multibeam extinction criteria in conventional electron microscopy. (author)
Dobson, P.J.; Pendry, J.B.; Humphreys, C.J. (eds.); Institute of Physics Conference Series; no. 41; p. 391-395; ISBN 0 85498 132 2; ; 1978; p. 391-395; Institute of Physics; Bristol; International conference on electron diffraction; London, UK; 19 - 21 Sep 1977