1. Strings, tensorial combinants and Bartlett adjustments;Barndorff-Nielsen,1986
2. Strings: Mathematical theory and statistical examples;Barndorff-Nielsen,1987
3. Derivative strings: Contravariant aspect;Barndorff-Nielsen,1987
4. Strings, strings and, ultimately, strings;Campbell;Nature,1986
5. Deformation theory of pseudogroup structures;Guillemin;Mem. Amer. Math. Soc.,1966