Valėnaitė, Edita, and Irena Zabielavičienė. “Analysis of Production Funds Efficiency in the country’s Crane Sector”. Mokslas – Lietuvos Ateitis Science – Future of Lithuania, vol. 4, no. 3, July 2012, pp. 274-7, https://doi.org/10.3846/mla.2012.43.