Davis: Present Status of Integral Equations 43 
294. G. Julia. Lignes de discontinuite des solutions de certain.es equations 
de Fredholm. Journal de Math., vol. 86 (1921), pp. 195-206. 
295. S. Pincherle. Sur une equation integrale dans le domaine complexe. 
Comptes Rendus, vol. 172 (1921), pp. 1395-1397. 
296. C. Platrier. Contribution a un theoreme sur les equations integrales de 
Fredholm de troisieme espece. Comptes Rendus, vol. 154 (1912), pp. 
808-811. 
297. D. Pompeiu . Sur une equation integrale. Math. Annalen, vol. 74 
(1913), pp. 275-277. 
298. H. Villat. Sur la resolution de certaines equations integrales et sur 
quelques problemes qui s’y rettachent. Acta Math., vol. 40 (1916), 
pp. 101-178. 
299. R. Wavre. Sur un equation de Fredholm dans le domaine complexe et 
son application a la theorie des systemes d’ equations lineaires a une 
infinite d’inconnues. Comptes Rendus, vol. 172 (1921), pp. 432-434. 
XIX. Integral Equations With Extended Definitions of the Integral 
300. C. A. Fischer. The Fredholm Theory of Stieltjes Integral Equations. 
Amer. Annales of Math., vol. 25 (1924), pp. 142-158. 
301. C. A. Fischer. On the Kernel of the Stieltjes Integral Corresponding 
to a Completely Continuous Transformation. Amer. Journal of Math., 
vol. 44 (1922), pp. 237-246. 
302. G. H. Hardy. The Theory of Cauchy’s Principal Values. (The Inte- 
gration of Principal Values with Application to the Inversion of Definite 
Integrals.) Proc. London Math. Soc., vol. 7, ser. 2 (1909), pp. 181-208. 
303. E. W. Hobson. On Linear Integral Equations. Proc. London Math. 
Soc., vol. 13 (1913-14), pp. 307-340. 
304. E. W. Hobson. On the Representation of the Symmetrical Nucleus of a 
Linear Integral Equation. Proc. London Math. Soc., vol. 14 (1914-15), 
pp. 5-30. 
305. E. E. Levi. Sulle equazioni integrali. Atti dei Lincei, vol. (16), (2), 
(1907), pp. 604-612. 
306. W. H. Young. On Bounded, Not Necessarily Continuous, Solutions of 
Integral Equations. Quart. Journal of Math., vol. 41 (1910), pp. 175-192. 
307. W. H. and Grace C. Young. On the Theorem of Riesz-Fischer. Quart. 
Journal of Math., vol. 44 (1913), pp. 49-88. 
XX. I ntegro -Differential Equations 
308. L. Amoroso. Sopra un’equazione integro-differenziale del tipo para- 
bolico. Atti dei Lincei, vol. 21 (2), (1912), pp. 141-146, 257-263. Also 
see pp. 400-404. 
309. G. Andreoli. Sulle »espressioni lineari integro-differenziali. Atti dei 
Lincei, vol. 22 (2), (1913), pp. 409-414. 
310. I. A. Barnett. Integro-Differential Equations with Constant Limits of 
Integration. Bull. Amer. Math. Soc., vol. 26 (1919-20), pp. 193-203. 
311. E. Daniele. Sulle equazioni differenziali e le equazioni integro- 
differenziali correlative. Atti dei Lincei, vol. 26 (1), (1917), pp. 302-308. 
312. G. Doetsch. Die Integro-differentialgleichungen von Faltungstypus. 
Math. Annalen, vol. 89 (1923), pp. 192-207. 
