City are trying to sign Geraldo, from Portuguese side Pacos de Ferreira, and Lewis Gobern, from Wolves,
according to the website talkingballs.co.uk. And
www.football-rumours.co.uk claims City are inerested in Wolves' Carl Cort, and Port Vale's Leon Constantine.
City have also been linked with Charlton's Radostin Kishishev, Marek Saganowski, from French club Troyes, MK Dons' Izale McLeod, Gillingham's Matthew Jarvis, Aston Villa's Lee Hendrie, Portsmouth's Svetoslav Todorov, Leeds' Richard Cresswell, and ex-Wigan defender Arjan de Zeeuw.
According to the Independent, City are favourites to sign Leon Best, who is set to leave Southampton after rejecting their latest new contract offer.
Danny Cadamarteri has joined League One side Huddersfield on a two-year deal.
Cadamarteri was out of contract after being released by City at the end of the season.
He made 11 appearances, all from the bench, and scored once, the late equaliser against Fulham in the FA Cup third-round game at the Walkers Stadium.