TY - SER AU - Petersen,Henrik I. AU - Bojesen-Koefoed,Jorgen A. AU - Nytoft,Hans P. AU - Bojesen-Koefoed,Jorgen A. AU - Nytoft,Hans P. TI - Source rock evaluation of Middle Jurassic coals, northeast Greenland, by artificial maturation : aspects of petroleum generation from coal ER -