see Ratko Janev on Google Scholar: http://scholar.google.com/scholar?hl=en&q=r.k.+janev&btnG=&as_sdt=1%2C5&as_sdtp=
contribution of Ratko Janev edit
Ratko Janev formulated basic laws of atomic physics of the fusion plasmas. Resolved problem of impurities of fusion plasmas and proposed fusion divertor solutions for European Tokamak.