MIMRA, Miroslav. Application of the "boundary line analysis method" for the optimisation of the number of tractors used in an agricultural company. In Agricultural economics. - Prague : Czech academy of agricultural sciences, 2014. ISSN 0139-570X, 2014, vol. 60, no. 1, s. 1-8. Dostupné na : <http://www.agriculturejournals.cz/publicFiles/112644.pdf>