Sika: «Der Respekt vor uns Geschwistern ging verloren» | BILANZ
SIKA: Urs Burkard: «Rache war nie Verkaufsgrund»
Katharina Bart: «Wealthy Families Must Face Uncomfortable Truths»
Monica Burkard: Sika-Erbin steckt Millionen in Luxus-Anwesen am Zürichsee | Handelszeitung
Urs Burkard, representative of the majority shareholders of Swiss chemicals group Sika awaits the company's extraordinary shareholder meeting in the town of Baar July 24, 2015. The board of Swiss chemicals firm
Saint-Gobain targets Sika with SFr2.75bn bid for Burkard stake | Financial Times
Takeover war of attrition grinds on at Sika - SWI swissinfo.ch