Massazza F, Francardi MT. Quick determination of free lime: modification of the Franke and Schlaepfer- Bukowski methods. Mater. constr. [Internet]. 1971Mar.31 [cited 2024Apr.29];21(141):29-36. Available from: https://materconstrucc.revistas.csic.es/index.php/materconstrucc/article/view/1516