MONTREAL - A Quebec man sentenced to life for fatally stabbing his two young children is seeking permission to appeal the minimum length of time he must serve before he can make a request to be released.

Guy Turcotte's lawyers filed a motion before the Quebec Court of Appeal today, hoping to challenge the trial judge's ruling he must spend at least 17 years behind bars before being able to apply for parole.

It is scheduled to be heard Feb. 23.

The former doctor was found guilty last December of second-degree in the February 2009 deaths of Olivier and Anne-Sophie, who were stabbed a total of 46 times.

It was the second trial for Turcotte, who in 2011 was found not criminally responsible for mental health reasons.

His lawyers have already appealed the second verdict and are seeking a third trial.