The Independent Pronominal Possessor is normally expressed by the demonstrative (sa) + special adposition (d) + personal pronoun.
According to Chaudenson (1974: 360), sa d + personal pronoun seems to be the "normal" form. He adds: "On dit souvent la myèn 'le mien, les miens, la mienne, les miennes', la tyèn, la syèn, la nòt, la vòt; à la 3e pers. du pl. on a toujours sa d zòt." [La myèn 'mine', la tyèn, la syèn, la nòt, la vòt is often used; for the 3rd person singular we always have sa d zòt.]
Staudacher (2004: 77) lists an impressive variety of forms which I could not find attested in my corpora.
More research is needed.
Source: Chaudenson 1974: 360
Source: Barat et al. 1977: 17