ABE, T. and T. SASAHARA 1982. Variation in callus formation from seeds in japonica, indica, their hybrids, and large grain varieties in rice. Japan. J. Breed. 32: 53-60.
AHLOOWALIA, B. S. 1982. Plant regeneration from callus culture in wheat. Corp Sci. 22: 405-410.
CUMMINGS, D. P., C. E. GREEN and D. D. STUTHMAN 1976. Callus induction and plant regeneration in oat. Crop Sci. 16: 465-470.
DEKA, P. C. and S. K. SEN 1976. Differentiation in calli originated from isolated protoplasts of rice (oryza sativa L.) through plating technique. Molec. gen. Genet. 145: 239-243.
FOROUGHI-WEHR, B., W. FRIEDT and G. WENZEL 1982. On the genetic improvement of androgenetic haploid formation in Hordeum vulgare L. Theor. Appl. Genet. 62: 233-239.