1. BEVERTON, R.J.H. and S.J. HOLT, 1956. A review of methods for estimating mortality rates in fish populations, with special references to sources of bias in catch sampling. Rapp. P.-V. Réun. Cons. Int. Explor. Mer. 140: 67–83.
2. BEVERTON, R.J.H. and S.J. HOLT, 1966. A manual of methods for fish stock assessment. Part 2. Tables of yields functions. FAO Fish Technic. Pap. 38 Rev. 1: 67.
3. BERTI, R., L. CHELAZZI, I. COLOMBINI and A. ERCOLINI, 1992. Direction finding ability in a mudskipper from the delta of the Tana River (Kenya). Trop. Zool. 5: 219–228.
4. BERTI, R., L. CHELAZZI, I. COLOMBINI and A. ERCOLINI, 1994. Directional orientation in Kenyan populations ofPeriophthalmus sobrinus Eggert: Experimental analysis of the operating mechanisms. J. Exp. Mar. Biol. Ecol. 181: 135–141.
5. BREY, T., M. SORIANO and D. PAULY, 1988. Electronic length frequency analysis. A revised and expanded users guide to ELEFAN 0, 1 and 2 (2nd edition.) Ber. Inst. Meereskunde (Kiel), 1–31.