Main restrictions in the synthesis of new superheavy elements: Quasifission and/or fusion fissionAvazbek Nasirov, Kyungil Kim, Giuseppe Mandaglio, Giorgio Giardina, Akhtam Muminov and Youngman KimEur. Phys. J. A, 49 11 (2013) 147DOI: https://doi.org/10.1140/epja/i2013-13147-y