Zhongying Chen Ronghua Li Aihui Zhou A Note on the Optimal <i>L</i><sup>2</sup>-Estimate of the Finite Volume Element Method. 291-303 2002 16 Adv. Comput. Math. 4 http://dx.doi.org/10.1023/A:1014577215948 db/journals/adcm/adcm16.html#ChenLZ02