Perhaps you should try some spelling variations:
"schriftenreihe der matus cernak instituts" » "schriftenreihe des matus cernak instituts" (Expand Search), "schriftenreihe der mais cernak instituts" (Expand Search), "schriftenreihe der math cernak instituts" (Expand Search)
"schriftenreihe des maus cernak instituts" » "schriftenreihe des matus cernak instituts" (Expand Search), "schriftenreihe die maus cernak instituts" (Expand Search)

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