Mačiulaitis, Romualdas, and Dzigita Nagrockienė. 2001. “Evaluation of Porous Concrete Resistance to Freezing by Different methods/Akytojo Betono Atsparumo šalčiui, Taikant Skirtingas Bandymų Metodikas, Vertinimas”. Journal of Civil Engineering and Management 7 (5):397-404. https://doi.org/10.3846/13921525.2001.10531761.