1. Ahmed SU, Saha HK, Sharfuddin AFM (1988) Study of heterosis and correlation in tomato. Thai J Agric Sci 21: 117–123
2. Aliev RT, Mamedova AD, Azizov IV (1986) Content of nucleic acids and activity of phytochemcial reactions in tomatoes in relation to heterosis. Sel Skokhozyaistvennaya Biol 4: 67–70
3. Averchenkova ZG (1981) Characteristics of the expression of heterosis in tomatoes. Prog Tekhnol Vyrashchivaniya Ovoshch Kultur Moscow, USSR, pp 72–77
4. Azzam H (1960) Natural cross-pollination of tomatoes in Puerto Rico. Am Soc Hortic Sci Caribbean Region Proc 4: 85–86
5. Baralieva D, Khristova I, Hristova I (1982) Isoenzyme composition of peroxidase in seedlings of heterotic tomato crosses. Genetika: Selektsiya 15: 30–41