How to get property shares after parents death

Dear sir,
After death of my parents (both) our brothers are not giving us justified shares of property they claim that they have ownership of 80% (three brothers living in same house) and remaining 20% will be distributed among all we are 7 sisters and 3 brother so is it possible legally that they ownership of 80% and how can we get it confirm as they are not willing to show us property paper

It is better for you to hire a lawyer. He will send court notices to them to appear in court and then court will decide how to share property and other assets among the family.