RÉH, Roman et al. Analysis to improve the strength of beds due to the excess weight of users in Slovakia. In Sustainability [elektronický zdroj]. ISSN 2071-1050, 2019, vol. 11, issue 3, art. no. 624 [17 p.] [online]. APVV-16-0297 ; APVV-14-0506 ; VEGA 1/0626/16. CCC, WOS, SCOPUS. Dostupné na internete: <https://www.mdpi.com/2071-1050/11/3/624/htm>