Keabsahan akta notaris yang memuat kesepakatan hak asuh anak dibawah umur : studi kasus Putusan Pengadilan Agama Marabahan No. 0018/PDT.G/2017/PA.MRB dan Putusan Pengadilan Tinggi Agama Bandung No. 0137/PDT.G/2017/PTA.BDG = Validity of the notary deed containing agreements regarding joint child custody for underaged child : study case Marabahan Religious Court Verdict No. 0018/PDT.G/2017/PA.MRB and Bandung High Religious Court Verdict No. 0137/PDT.G/2017/PTA.BDG