Ratko Tosic Dragan Masulovic Ivan Stojmenovic Jon Brunvoll Bjørg N. Cyvin Sven J. Cyvin Enumeration of Polyhex Hydrocarbons to h = 17. 181-187 1995 35 Journal of Chemical Information and Computer Sciences 2 db/journals/jcisd/jcisd35.html#TosicMSBCC95