TY - JOUR A1 - Pawlowsky-Glahn, V. A1 - Buccianti, A. T1 - Visualization and modeling of subpopulations of compositional data: statistical methods illustrated by means of geochemical data from fumarolic fluids Y1 - 2002 DO - 10.1007/s005310100222 VL - 91 IS - 2 ER -