GASHI B, OSMANI M, ALIU S. Breaking seed dormancy of Tulipa scardica Bornm. and Tulipa kosovarica Kit Tan, Shuka & Krasniqi by pre-chilling, plant growth regulators and some chemical treatments. aas. 2019;113(2):203–210. doi:10.14720/aas.2019.113.2.1