%0 Journal Article %A Barbara Lee Keyfitz %T Singular shocks: retrospective and prospective %J Confluentes Mathematici %D 2011 %P 445-470 %V 3 %N 3 %I World Scientific Publishing Co Pte Ltd %U https://cml.centre-mersenne.org/articles/10.1142/S1793744211000424/ %R 10.1142/S1793744211000424 %G en %F CML_2011__3_3_445_0