Aleksandar Ilic Dragan Stevanovic Lihua Feng Guihai Yu Peter Dankelmann Degree distance of unicyclic and bicyclic graphs. 779-788 2011 159 Discret. Appl. Math. 8 https://doi.org/10.1016/j.dam.2011.01.013 db/journals/dam/dam159.html#IlicSFYD11
