Ginsberg was an important influence on Jim. Ginsberg's 'Howl' poem came out in the mid-fifities; however, I believe that it was Ginsberg's later work, from about 1965, that gave Jim the idea to go into rock music.
Here is an example of a Ginsberg poem from 1965;
The Olympics have descended into red velvet basement theaters of Centrum long long hair over skeleton boys thin black ties, pale handsome cheeks - and screams and screams, Orchestra mob ecstasy rising from this new generation of buttocks and eyes and tender nipples Because the body moves again, the body dances again, the body sings again the body screams new-born after War, infants cursed with secret cold jail deaths of the Fifties - Now girls with new breasts and striplings wearing soft golden puberty hair - 1000 voices scream five minutes long clapping thousand handed in great ancient measure saluting the Meat God of XX Century that moves thru the theater like the secret rhythm of the belly in Orgasm Kalki! Apocalypse Christ! Maitreya! grim Chronos weeps tired into the saxophone, The Earth is Saved! Next number! SHE'S A WOMAN Electric guitar red bells! and Ganymede emerges stomping his feet for Joy on the stage and bows to the ground, and weeping, GIVES. Oh the power of the God on his throne constantly surrounded by white drums right hand Sceptered beating brass cymbals!