Advice for selling an undivided land

My father along with his three brothers bought a property in the name of their wives. Later the complete property was transfered in my mother's name by the other three aunts. We are two brothers and two sisters. Sisters are married in very sound families for past 40 years. And they are not willing to sign on NOC, neither is my brother willing to give me half of the property. my father died in 1992 and mother in 2011. There is no will.what is my share in such property and how do I sell it as I don't live here.