[3] His lyrics are regarded as an important contribution to the renewal of Norwegian poetry that took place in the late 1960s.
He has also translated works by the surrealists Paul Éluard, Robert Desnos, Henri Michaux and Benjamin Péret.
[1] Heggelund co-edited the literary magazine Vinduet with Jan Erik Vold from 1970 to 1974.
He has also edited works by Petter Dass, Ludvig Holberg and Johan Herman Wessel.
[5] He received the Norwegian Academy Prize in memory of Thorleif Dahl in 1995, and the Herman Wildenvey Poetry Award in 1996.