Aspelund
Acta Academiae Aboensis, Series B: Mathematica et Physica, 1936 , vol. 10, # 2 p. 5
Acta Academiae Aboensis, Series B: Mathematica et Physica, 1936 , vol. 10, # 9 p. 3
Chem. Zentralbl., 1937 , vol. 108, # II p. 1817,2004
Aspelund
Acta Academiae Aboensis, Series B: Mathematica et Physica, 1939 , vol. 12, # 2 p. 7,26
Chem.Abstr., 1943 , p. 6251
Chem. Zentralbl., 1942 , vol. 113, # II p. 1120
Aspelund
Acta Academiae Aboensis, Series B: Mathematica et Physica, 1939 , vol. 12, # 5 p. 6,20
Chem.Abstr., 1947 , p. 2413
Chem. Zentralbl., 1942 , vol. 113, # II p. 1122
Aspelund
Acta Academiae Aboensis, Series B: Mathematica et Physica, 1939 , vol. 12, # 2 p. 7,26
Chem.Abstr., 1943 , p. 6251
Chem. Zentralbl., 1942 , vol. 113, # II p. 1120