1.First get relinquishment deed done by the sisters and mother present in india by which yu would become 4/5th shareholder in the proeprty left by your father.
2.Now for the sister living in Australia she need to execute a notarised POA sitting in Australia / Once the said notarised copy reaches in India through post you need to get Adjudicated it in local Collectorate.
3.Now the Attorney mentioned in the POA can on behalf of the said sister can transfer her share in your favour.
4. If the proeprty eft by father is not ancestral but his selfacquied then year of his death makes no difference as far as right of equal share on the daughter is concerned.