1. On correlation between variables of constant sum;Chayes;J. Geophys. Res.,1960
2. On the definition of a cave;Curl;Bull. Nat. Speleol. Soc.,1964
3. A statistical theory of cave entrance evolution;Curl;Bull. Nat. Speleol. Soc.,1968
4. Velocita di soluzione negli acide dei carbonati rhomboedrici bivalenti;Ferrari;Gazz. Chim. Ital.,1937
5. Practical petrographic classification of limestones;Folk;Bull. Amer. Ass. Petrol. Geol.,1959