I was reading this biography recently when I came upon this passage:

Of the beat writers, only William Burroughs had given him the cold shoulder, snubbing him at a reading, which was ironic because Burroughs was the only one he admired. Bukowski muttered about going outside and fighting him.

‘I could push him over with one punch,’ he told Harold Norse, who knew them both.

‘Yeah, but you’d be dead,’ said Norse. ‘He’d shoot you.’

The Unofficial William Burroughs Homepage