1. Non Linear Optical Properties of Organic and Polymeric Materials, American Chemical Society,1983
2. Synthesis, crystal growth and characterisation of a new nonlinear optical material-urea l-malic acid;de Matos Gomes;J. Synth. Metal,2000
3. 2-Amino-5-nitropyridinium monohydrogenphosphite;Pecaut;J. Acta Crystallogr,1993
4. Charge-transfer induced large nonlinear optical properties of small Al clusters: Al4M4 (M = Li, Na and K);Ayan;J. Chem. Phys.,2003