Андрющенко, А.В. and Кривицький, К.М. 2007. Referring to the method of maturity group determination for varieties and hybrids of Maize according to the FAO indices. Plant varieties studying and protection. 5 (Jun. 2007), 59–74. DOI:https://doi.org/10.21498/2518-1017.5.2007.66598.