1. B. Ni, M. Liu, Sh. Lu (2009)” Multifunctional slow-release urea fertilizer from ethyl cellulose and superabsorbent coated formulations”, Chem. Eng. J ,155, 892-898.
2. O.A. Salman (1988) “Polymer coating on urea prills to reduce dissolution rate”, J. Agric. Food Chem, 36 , 616-621.
3. F.H. Otey, D. Trimnell, R.P. Westhoff, and B.S. Shasha (1984) “ Starch matrix for controlled release of urea fertilizer”, J. Agric. Food Chem. 32 , 1095-1098.
4. N. Junejo, M.M. Hanafi, Y.M. Khanif, W.M.Z. Wan Yunus(2009) “ Effect of Cu and palm stearin coatings on the thermal behavior and ammonia volatilization loss of urea”, Res. J. Agric. & Biol. Sci, 5 , 608-612.
5. A. Jarosiewicz, M. Tomaszewska (2003) “Controlled-release NPK fertilizer encapsulated by polymeric membranes”, J. Agric. Food Chem, 51 , 413-417.
6. O. A. Salman (1989) “Polyethylene-coated urea Improved storage and handling properties”, Ind. Eng. Chem. Res, 28 , 630-632.
7. R. Ito, B. Golman, K. Shinohara (2003) “Controlled release with coating layer of permeable particles”, J. Control. Release 92 ,361-368.
8. Guertal, E.A (2009) “Slow-release nitrogen fertilizers in vegetable production: a review”. Hort Technology, 19, 16-19.
9. Salman, O.A (1989) “Polyethylene-coated urea. Improved storage and handling properties” Ind. Eng. Chem. Res, 28, 630-632.
10. S M. Al-Zahrani (2000)” Utilization of polyethylene and paraffin waxes as controlled delivery systems for different fertilizers” Ind. Eng. Chem. Res, 39, 367-371.
11. M M.Hanafi, S M. Eltaib and M B. Ahmad (2000) “ Physical and chemical characteristics of controlled release compound fertilizer” Eur. Polym. J. 36, 2081-2088.
12. A. Jarosiewicz and M. Tomaszewska (2003) “Controlled-release NPK fertilizer encapsulated by polymeric membranes” J. Agric. Food Chem, 51, 413-417.
13. R. Liang and M Z. Liu (2006) “Preparation and properties of a double-coated slow-release and water-retention urea fertilizer” J. Agric. Food Chem, 54, 1392-1398.
14. D W. Glennie, J L. McCarthy (1962) “Pulp and Paper Science and Technology” New York: McGraw- Hill Book Company, Inc., pp. 82-107.
15. E. Dorrestijn, L G. Laarhoven, IWCE .Arends , P.Mulder (2000)” The occurrence and reactivity of phenoxyl linkages in lignin and low rank coal” J Anal Appl Pyrolysis , 54:153–92.
16. W J. Mulder (2011)” Lignin based controlled release coatings”,Industrial Crops and Products, 34, 915-920.
17. M. Fernandez-Perez, M.V.-S., F. Flores-Cespedes, I. Daza-Fernandez (2011) “Ethylcellulose and lignin as bearer polymers in controlled release formulations of chloridazon”, Carbohydrate Polymers, 83, 1672-1679.
18. Ramı (2001”)Slow-release effect of N-functionalized kraft lignin tested with Sorghum over two growth periods”, Bioresource Technology, 76, 71-73.
19. Fernández-Pérez (2008) “Lignin and ethylcellulose as polymers in controlled release formulations of urea”, Journal of Applied Polymer Science, 108, 3796-3803.
20. C. Crestini (2000) “The reactivity of phenolic and non-phenolic residual kraft lignin model compounds with Mn(II)-peroxidase from Lentinula edodes”, Bioorganic & Medicinal Chemistry, 2000. 8, 433-438.
21. R. Bolle, and W. Aehle (2000) “Lignin based paint”, Patents.573312
22. N. Sadeghi, K. Shayesteh and S. Lotfiman, Effect of Modified Lignin Sulfonate on Controlled-Release Urea in Soil. Journal of Polymers and the Environment, 2016: p. 1-8.
23. مسعودی فر؛ س، (1391) "اصلاح شیمیایی لیگنین جهت استفاده بهعنوان پوشش برای تولید کود کنترل رهش اوره" پایان نامه کارشناسی ارشد رشته مهندسی شیمی، دانشکده فنی و مهندسی، دانشگاه رازی،70 صفحه
24. کالم ا. اس. هیل (ترجمه احمدجهان لتیباری) (1391) "اصلاح چوب " دانشگاه آزاد اسلامی، 360 صفحه
25. S. Laurichesse and L. Avérous (2014)” Chemical modification of lignins: Towards biobased polymers” Progress in Polymer Science, 39, 1266-1290
26. C S. James, (1995) “Analitical chemistry of foods”. Blackie academic Professional Press.
27. Q. Shen, T. Zhang and M.-F. Zhu (2008) “A comparison of the surface properties of lignin and sulfonated lignins by FTIR spectroscopy and wicking technique”, Colloids and Surfaces A: Physicochemical and Engineering Aspects, 320, 57-60.
28. N. El Mansouri and J. Salvadó (2007)”Analytical methods for determining functional groups in various technical lignins” Industrial Crops and Products, 26, 116-124.
29. G B.Carmen,B. Dominique, R J. Gosselink , J E. Van Dam ( 2004)” Characterization of structure-dependent functional properties of lignin with infrared spectroscopy” Ind. Crops Prod. 20, 205–218.
30 صادقی، ن،(1394) "مطالعه آزمایشگاهی رهش نیتروژن از کود اوره با پوشش لیگنین سولفونات" پایان نامه کارشناسی ارشد رشته مهندسی شیمی، دانشکده فنی و مهندسی، دانشگاه محقق اردبیلی، صفحه 178