Before revision: Biospeleology was formalized as a science in 1907 by Emil Racoviţă with his seminal work Essai sur les problèmes biospéologiques ("Essay on biospeleological problems " ).
After revision: Biospeleology was formalized as a science in 1907 by Emil Racoviţă with his seminal work Essai sur les problèmes biospéologiques (”Essay on biospeleological problems " ).