The catena-arsenite chain anion, [AsO2](n)(n-): (H3NCH2CH2NH3)0.5[AsO2] and NaAsO2 (revisited).
Lee C, Harrison WT. The catena-arsenite chain anion, [AsO2](n)(n-): (H3NCH2CH2NH3)0.5[AsO2] and NaAsO2 (revisited). Acta Crystallogr C. 2004 May; 60(Pt 5):m215-8.