@article{JaentschiL73 ,year = "2017" ,journal = "Mathematics" ,title = "Extending the Characteristic Polynomial for Characterization of C20 Fullerene Congeners" ,author = "Joița, Dan M. and Jäntschi, Lorentz" ,volume = "5" ,number = "4" ,pages = "84" ,ISSN = "2227-7390" ,doi = "10.3390/math5040084" ,url = "http://lori.academicdirect.org/pdfs/400/307.pdf" }