On the set of values of the system { f ( z 1 ) , ⋯ , f ( z n ) } in the class of typically real functions. Goluzina, E.G. — 2004 Zapiski Nauchnykh Seminarov POMI
On the region of values of the system { f ( z 1 ) , ... , f ( z n ) } in the class of typically real functions. II. Goluzina, E.G. — 2005 Zapiski Nauchnykh Seminarov POMI