Pelaksanaan eksekusi dalam sengketa tanah girik dengan sertipikat di kota Bekasi : tinjauan yuridis terhadap Putusan Mahkamah Agung Republik Indonesia nomor 557 PK/Pdt/2008 = The implementation of the execution on girik land dispute with its certificate in Bekasi : juridical review on the Verdict of the Supreme Court of the Republic of Indonesia number 557 PK/Pdt/2008