Peran notaris melindungi kepentingan penjual dan pembeli dalam rangka pelaksanaan perjanjian pengikatan jual beli (Studi Kasus Putusan Mahkamah Agung No: 2081k/Pdt/2014 Jo.617/PDT/2013/PT.DKI Jo.117/Pdt.G/2013/PN.Jkt.Pst) = The role of the notary to protect the interest of the seller and the buyer in relation of the execution of preliminary sales and purchase agreement (Studi Kasus Putusan Mahkamah Agung No: 2081k/Pdt/2014 Jo.617/PDT/2013/PT.DKI Jo. 117/Pdt.G/2013/PN.Jkt.Pst) / Kohar Bastian Toha