The unpublished dissertation of Jaromír Jedlička, O zvláštním případu parallelismu suffixů v jazycích indoevropských [On a Special Case of Suffix Parallelism in Indo-European Languages], Prague 1894 (178 pp.) investigated nominal derivations with the suffixes *-es/s- and *-ró-, *-ló-, *-mó-, *-nó-, taking into account all Indo-European languages known at that time and analysing 284 roots. His systematic account of the s-suffix and parallel nominal suffixes, written almost simultaneously with the publications of Caland, marks a long overlooked pioneering contribution to the understanding of relationships between nominal and verbal derivation in Indo-European.