In that period , in the `` Call for Subscriptions to the Croatian Grammar '' ( 8 December 1851 ) he stated his opposition to the Vienna Language Agreement of 1850 and the linguistic concept of Vuk Stefanović Karadžić .
In that period , in the `` Call for Subscriptions to the Croatian Grammar '' ( 8 December , 1851 ) he stated his opposition to the Vienna Language Agreement of 1850 and the linguistic concept of Vuk Stefanović Karadžić .