"Examining Shackleton's methods can teach you five key lessons a leader needs to learn to perform effectively, " Buelens says.

FORBES: The Business School Beat

According to Buelens what Apple should be doing is issuing some sort of statement that, while Jobs can never really be replaced, the culture he has instilled in the company will live on under any circumstances.

FORBES: No place for Napoleon at Apple Inc.

Marc Buelens, who teaches in the international MBA program at the Vlerick Management School, in Belgium, now devotes a large part of his leadership course to an extended case study of the polar explorer Ernest Shackleton.

FORBES: The Business School Beat