▁for ▁academic ▁purposes ▁by ▁A ul ik ki ▁E rom ä ki ▁and ▁In grid ▁Wagner , ▁where up on ▁the ▁artist ▁had ▁the ▁opportunity ▁to ▁give ▁a ▁lecture ▁at ▁the ▁Berlin ▁University ▁of ▁the ▁Arts ▁in ▁ 1 9 9 1 , ▁as ▁part ▁of ▁her ▁participation ▁in ▁the ▁exhibition ▁" Im ▁Unter schied " ▁at ▁the ▁N GB K . ▁Ren zi ▁had ▁turned ▁to ▁ac ry lic s ▁in ▁her ▁work ▁on ▁canvas ▁during ▁the ▁ 1 9 8 0 s , ▁but ▁then ▁switched ▁back ▁to ▁oil , ▁now ▁tre ating ▁the ▁layers ▁differently . ▁During ▁the ▁ 1 9 9 0 s , ▁she ▁had ▁five ▁solo ▁exhib itions , ▁in ▁C ux h aven , ▁F res nes ▁and ▁Paris , ▁and ▁her ▁work ▁was ▁included ▁in ▁permanent ▁collections ▁in ▁C ux h aven , ▁Gu ang z hou , ▁Ma astr icht , ▁New ▁York ▁and ▁Sar cell es . ▁During ▁this ▁de cade , ▁Ren zi ' s ▁work ▁appears ▁in ▁more ▁than ▁thirty - five ▁group ▁exhib itions ▁or ▁sal ons , ▁in ▁Berlin , ▁Ch enne vi ères - sur - Mar ne , ▁Fred rik stad , ▁Gren o ble , ▁La ▁Vil led ieu , ▁L jub lj ana , ▁Ma astr icht , ▁N antes , ▁New ▁York , ▁Paris , ▁Sar cell es ▁and ▁Ville - d ' Av ray . ▁Ren zi ▁participated ▁in ▁several ▁books , ▁et ch ings ▁of ▁hers ▁being ▁for ▁instance ▁part ▁of ▁"