I found some articles about the relashionship. Sorry if the traslation is not good.
The Bardinogianni family and the OFI seized the Cretan team in 1979 in the start of professional season in Greece. This movement was a pointedly effort is set up a feed team for their main interest, the giant of Athens, the Panathinaikos. The family [Bardinogianni], as a lot of Greek millionaires, made their fortune from the naval industry. The relation of parent of - child of two teams that plays in the same category was blamed intensely by the dues of decade the 70 but nothing did not become substantially in order to is searched her legality. On the contrary the Panathinaikos and the competitor Olympic made similar relations and with other teams first and second category. Giorgos [Bardinogiannis] former chairman of PAO is the one that manages the economic resources in OFI, even if the sums that spending in the Athenian and Cretan team have accepted acute reduction in the past few year
The known relation of Panathinaikos with OFI resembles today exceptionally innocently, almost romantic, [par]' that the bad faith that traditionally it causes in the confrontations of two teams can give a picture for what it will happen in the space thus and exists be it more suspicions for “same boss” in from one team. With difficulty however it can speak no one for multi-ownership to the case in question. As householders of OFI are brought Sirs.s Sarris and Synaxakis, in reality however all know that behind them exists the group Bardinogianni which today possesses the 89,3% of action of OFI covering in deed with 700 millions of Drs the summertime the '99 increase of participial capital. The two householders undertook the team of Crete in May 1981 with the benedictions of family and from then the thing function “as common secret”. In the PAO Mr Giorgos Bardinogiannis had established his empire in 1979 and the family was convinced to help the team of Crete removing from the impasse the then chairman Mr Nikos Doyloyfaki that faced serious economic problems. With OFI it dealt almost personally and exclusively Theodoros [Bardinogiannis], which not only travelled often in Heraklion in order to it sees match from the platform of bigots (!) but it existed also founder the training centre of OFI that today brings his name. The chairman of PAO Mr Giorgos Bardinogiannis was not mixed with the administrative and finances of Cretan squad and in particular ago three years, in 1997, afterwards the death of Theodoros [Bardinogianni], Mr Entire Myriokefalitakis administrative soul of OFI ¬ scared of difficult days for the team asked from the householder of team of basket Heraklion Mr Manolis [Papakaliati] to lead team of businessmen in order to is ensured her future! Today for the OFI are interested Minoan Lines, however never have not naturally deposited official proposal in the group of Bardinogianni neither in the supposed householders of company. For the relations of two teams they have been heard a lot of and various critical and the OFI was the first team that received from the Greek Press officially the label of “affiliated”. But the market of OFI from the family Bardinogianni was more a transaction of “price”, a obligation to Crete from which they come, despite the effort of creation of “pole” with particular aims and objectives. No that did not exist also such objectives. In the years of omnipotence the (1983-95) the Panathinaikos created many times over “trast” supporters usefull in administrative games that they have they make with the control of EPO (referees) and EPAE (football dicision center). Were united with the PAO, taking loaned players or guarantees for good confrontation by the institutions, teams as the Glory Dramas, Apollo, Corinthus Mr a. Proportional policy applied in his short passage from the Greek football and Giorgos Koskotas, which in time-record stretched out his tentacles placing persons of his confidence in teams as Panionios, Panseraikos, National and enough other. However these efforts do not have no relation with those who they happen today.