[1] Piringer, H.: Key factors to minimise emissions from parallel flow regenerative lime kilns. ZKG International 11-2015, pp. 44-53

[2] Piringer, H.: New and innovative Maerz PFR lime kiln for Kalkfabrik Netstal in Switzerland. ZKG Cement Lime Gypsum 1-2021, pp. 42-47

[3] Wallimann, R.: Modernising the annular shaft kiln with wood-fired side burners. ZKG Cement Lime Gypsum 2-2021, pp. 28-30

[4] Wallimann, R.: Replacing mixed feed lime kilns. ZKG Cement Lime Gypsum 5-2021, pp. 52-57

[5] Piringer, H.; Bucher, P.; Wallimann, R.: Sustainable lime burning technology with shaft kilns. ZKG Cement Lime Gypsum 6-2021, pp. 34-41

[6] Piringer, H.: New PFR lime kiln process with blast furnace gas and oxygen. ZKG Cement Lime Gypsum 8-2021, pp. 40-44

[7] Aschwanden, Y.; Piringer, H.; Riefkohl Brown, E.; Vázquez Murillo, L.: How to save 20% electric energy in Maerz PFR lime kilns. ZKG Cement Lime Gypsum 4-2022, pp. 86-91