XXth General Assembly of the IAU in Baltimore.

XXX Spin Chain: from Bethe Solution to Open Problems

XXXIX congress of the International Astronautical Federation held in Bangalore (India), 1988, October.

XXXVIIiéme Rencontres de Moriond: Electroweak 2002 Conference Summary

XXZ and Ising Spins on the Triangular Kagome Lattice

XXZ Bethe states as highest weight vectors of the $sl_2$ loop algebra at roots of unity

XXZ Bethe states as highest weight vectors of the $sl_2$ loop algebra at roots of unity

XXZ chain with a boundary

XXZ scalar products and KP

XXZ scalar products, Miwa variables and discrete KP

XXZ spin chain in transverse field as a regularization of the sine-Gordon model

XXZ-like phase in the F-AF anisotropic Heisenberg chain

XY Bootis - a W UMa-star with extreme rate of period change

XY checkerboard antiferromagnet in external field

XY frustrated systems: continuous exponents in discontinuous phase transitions

XY Leo and the Star BD +18 2304

XY model in small-world networks

XY model on the circle: diagonalization, spectrum, and forerunners of the quantum phase transition

XY models with disorder and symmetry-breaking fields in two dimensions

XY Pic: a Detached Binary Misclassified as a W UMa System