%0 Journal Article %A Yuanhong Zhi %A Yongkun Li %T A proof of method of cylindrical shells based on a generalized integral representation of additive interval function %J The Teaching of Mathematics %D 2014 %P 34 %V XVII %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/TM2_2014_XVII_1_a2/ %G en %F TM2_2014_XVII_1_a2