Elastic strain and stress determination by Rietveld refinement: generalized treatment for textured polycrystals for all Laue classes. Corrigenda

Errors in the article by Popa & Balzar [J. Appl. Cryst. (2001), 34, 187-195 ], caused by an equation from literature used without checking, are corrected. It is expected that other published papers will have been affected as the source error is in a reference book.